Martin Erich Philipp (1887 in Zwickau – 1978 in Dresden) was an influential German Jewish artist.

Philipp's style was particularly influenced by the Jugendstil movement, Germany's Art Nouveau counterpart. He was known for his color woodcuts of animals, especially birds, and his intaglios of nudes and erotic ex libris; additionally, he was an equally accomplished watercolorist whose studies for future woodcuts are as richly hued as the woodcuts themselves.

An Ex Libris (from ex-librīs, Latin for '"from the books (or library)"'),[1][2] also known as a bookplate (or book-plate, as it was commonly styled until the early 20th century),[3] is a printed or decorative label pasted into a book, often on the front endpaper, to indicate ownership. Simple typographical bookplates are termed "book labels".[4]

Bookplates often bear a motif relating to the book's owner, such as a coat-of-arms, crest, badge, motto, or a design commissioned from an artist or designer.[5][6][7] The name of the owner usually follows an inscription such as "from the books of..." or "from the library of...", or in Latin, "ex libris". Bookplates are important evidence for the provenance of books.

The most traditional technique used to make bookplates is burin engraving. The engraved copper matrix is then printed with an intaglio press on paper, and the resulting print can be pasted into the book to indicate ownership.

Ink stamps directly stamped on the books are not considered as bookplates by bibliophiles since they degrade the books and make them lose their market value (hence their use by public libraries, to dissuade theft).

In the United States, bookplates replaced book rhymes (which replaced book curses) after the 19th century.[8]

History

Early examples

Bookplate for Hildebrand Brandenburg of Biberach, woodcut, black printing ink, and hand coloring on paper (Germany, 1480). Bookplate is in Jacobus de Voragine’s Sermones quadragesimales (Bopfingen, Württemberg, 1408)

Sir Patrick (Peter) Budge Murray Threipland 4th Bt. of Fingask Castle (1762–1837). From a copy of a 1761 Book of Common Prayer

Bookplate depicting ancient city of Emporion or Empúries, in Catalonia, Spain

The bookplate of the Swedish and Norwegian king Oscar II.

The earliest known marks of ownership of books or documents date from the reign of Amenophis III in Egypt (1391−1353 BCE).[9][10]

However, in their modern form, they evolved from simple inscriptions in books which were common in Europe in the Middle Ages, when various other forms of "librarianship" became widespread (such as the use of class-marks, call numbers, or shelfmarks). The earliest known examples of printed bookplates are German, and date from the 15th century. One of the best known is a small hand-coloured woodcut representing a shield of arms supported by an angel, which was pasted into books presented to the Carthusian monastery of Buxheim by Brother Hildebrand Brandenburg of Biberach, about the year 1480—the date being fixed by that of the recorded gift. The woodcut, in imitation of similar devices in old manuscripts, is hand-painted. An example of this bookplate can be found in the Farber Archives of Brandeis University.[11] In France the most ancient ex-libris as yet discovered is that of one Jean Bertaud de la Tour-Blanche, the date of which is 1529. Holland comes next with the plate of Anna van der Aa, in 1597; then Italy with one attributed to the year 1622.[12] The earliest known American example is the plain printed label of Stephen Daye, the Massachusetts printer of the Bay Psalm Book, 1642.[13]

A sketch of the history of the bookplate, as a symbolical and decorative print used to mark ownership of books, begins in Germany. The earliest examples known are German, but also they are found in great numbers long before the fashion spread to other countries, and are often of the highest artistic interest. Albrecht Dürer is known to have engraved at least six copper plates (some quite large) between 1503 and 1516, and to have supplied designs for several others. Notable plates are ascribed to Lucas Cranach and to Hans Holbein, and to the so-called Little Masters (Masters of the small format—the Behams, Virgil Solis, Matthias Zundt, Jost Amman, Saldorfer, Georg Hupschmann and others). The influence of these draftsman over the decorative styles of Germany has been felt through subsequent centuries down to the present day, notwithstanding the invasion of successive Italian and French fashions during the 17th and 18th centuries, and the marked effort at originality of composition observable among modern designers. The ornate and elaborate German style does not seem to have affected neighbouring countries; but as it was undoubtedly from Germany that the fashion for ornamental bookplates spread, the history of German ex-libris remains of great interest to all those who are interested in their development.[14]

It was not before the 17th century that printed ex-libris became common in France. Until then, the more luxurious custom of blind- or gold-stamping a book's binding with a personal device had been more widespread: the supralibros. From the middle of the century, however, the ex-libris proper became quite popular; examples of that period are numerous, and, as a rule, very handsome. The term "ex-libris", used as a noun (Exlibris (written in one word) in German) originated in France.[14]

England

In many ways the consideration of the English bookplate, in its numerous styles, from the Tudor period to the late Victorian period, is particularly interesting. In all its varieties it reflects with great fidelity the prevailing taste in decorative art at different epochs—as bookplates do in all countries. In 2010 John Blatchly asked whether the hand-painted armorial device attached to a folio of the first volume of Quatuor concilium generalium belonging to Cardinal Wolsey should be regarded as the first English bookplate.[15] It is made of paper and was pasted onto the front pastedown of the book. However it was not printed. In this respect it is the only known example. The librarian David Pearson has argued that a plausible case can be made for regarding this as a kind of bookplate.[16]

Of English examples, none thus far seems to have been discovered of older date than the gift plate of Sir Nicholas Bacon; for the celebrated, gorgeous,[words missing] that once belonged to Henry VIII, and now is located in the King's library, British Museum, does not fall in the category of bookplates in its modern sense. The next example is that of Sir Thomas Tresham, dated 1585. Until the last quarter of the 17th century the number of authentic English plates is very limited. Their composition is always remarkably simple, and displays nothing of the German elaborateness. They are as a rule very plainly armorial, and the decoration is usually limited to a symmetrical arrangement of mantling, with an occasional display of palms or wreaths. Soon after the Restoration, however, a bookplate seems to have suddenly become an established accessory to most well-ordered libraries.[14]

The first recorded use of the phrase book plate was in 1791 by John Ireland in Hogarth Illustrated.[17] Bookplates of that period are very distinctive. In the simplicity of their heraldic arrangements they recall those of the previous age; but their appearance is totally different. First, they invariably display the tincture lines and dots, after the method originally devised in the middle of the century by Petra Sancta, the author of Tesserae Gentilitiae, which by this time had become adopted throughout Europe. Second, the mantling surrounding the face of the shield assumes a much more elaborate appearance which recalls that of the contemporary periwig. This style was undoubtedly imported from France, but it assumed a character of its own in England.[14]

From then until the dawn of the French Revolution, English modes of decoration in bookplates, as in most other chattels, follow at some years' distance the ruling French taste. The main characteristics of the style which prevailed during the Queen Anne and early Georgian periods are: ornamental frames suggestive of carved oak; a frequent use of fish-scales; trellis or diapered patterns, for the decoration of plain surfaces; and, in the armorial display, a marked reduction in the importance of the mantling. The introduction of the scallop-shell as an almost constant element of ornamentation gives a foretaste of the Rocaille-Coquille, the so-called Chippendale fashions of the next reign. During the middle third of the century this rococo style (of which the Convers plate gives a typical sample) affects the bookplate as universally as all other decorative objects. Its chief element is a fanciful arrangement of scroll and shell work with curveting acanthus-like sprays—an arrangement which in the examples of the best period is generally made asymmetrical in order to give freer scope for a variety of countercurves. Straight or concentric lines and all appearances of flat surface are studiously avoided; the helmet and its symmetrical mantling tends to disappear, and is replaced by the plain crest on a fillet. The earlier examples of this manner are tolerably ponderous and simple. Later, however, the composition becomes exceedingly light and complicated; every conceivable and often incongruous element of decoration is introduced, from cupids to dragons, from flowerets to Chinese pagodas. During the early part of George III's reign there is a return to greater sobriety of ornamentation, and a style more truly national, which may be called the urn style, makes its appearance. Bookplates of this period invariably have an appearance which at once recalls the decorative manner made popular by architects and designers such as Chambers, the Adams, Josiah Wedgwood, Hepplewhite and Sheraton. The shield shows a plain spade-like outline, manifestly based upon that of the pseudo-classic urn then very alive. The ornamental accessories are symmetrical palms and sprays, wreaths and ribands. The architectural boss is also an important factor. In many plates, indeed, the shield of arms takes quite a subsidiary position by the side of the predominantly architectural urn.[18]

Bookplate awarded as a Sunday School prize for 1898.

Some bookplates were issued by institutions, often religious ones, which awarded books to individuals to recognise academic performance, good behaviour and the like. These would be inscribed with the name of the individual by hand. Such plates could be very elaborate, or very simple in their design, reflecting the character of the awarding institution.[citation needed][19]

From the beginning of the 19th century, no special style of decoration seems to have established itself. The immense majority of examples display a plain shield of arms with motto on a scroll, and crest on a fillet. At the turn of the 20th century, however, a rapid impetus appears to have been given to the designing of ex-libris; a new era, in fact, had begun for the bookplate, one of great interest.[20]

The main styles of decoration have already been noted. But certain styles of composition were also prevalent at certain periods.[20] Although the majority of the older plates were armorial, there were always pictorial examples as well, and these are the quasi-totality of modern ones.

Of this kind the best-defined English genre may be recalled: the library interior—a term which explains itself—and book-piles, exemplified by the ex-libris of W. Hewer, Samuel Pepys's secretary. We have also many portrait-plates, of which, perhaps, the most notable are those of Samuel Pepys himself and of John Gibbs, the architect; allegories, such as were engraved by Hogarth, Bartolozzi, John Pine and George Vertue; landscape-plates by wood-engravers of the Bewick school, etc. In most of these the armorial element merely plays a secondary part.[20]

Bookplate of Sir Charles Philip Huntington, 1912

Bookplate of Sir Charles Philip Huntington, 1912

1899 bookplate

1899 bookplate

Bookplate of Jane Patterson, 1890s

Bookplate of Jane Patterson, 1890s

1810 British bookplate

1810 British bookplate

Art

Ex-libris of Hungary bookplate stamp

Until the advent of bookplate collectors and their frenzy for exchange, the devising of bookplates was almost invariably left to the routine skill of the heraldic-stationery salesman. Near the turn of the 20th century, the composition of personal book tokens became recognized as a minor branch of a higher art, and there has come into fashion an entirely new class of designs which, for all their wonderful variety, bear as unmistakable a character as that of the most definite styles of bygone days. Broadly speaking, it may be said that the purely heraldic element tends to become subsidiary and the allegorical or symbolic to assert itself more strongly.[21]

Among early 20th-century English artists who have more specially paid attention to the devising of bookplates, may be mentioned C. W. Sherborn, G. W. Eve, Robert Anning Bell, J. D. Batten, Erat Harrison, J. Forbes Nixon, Charles Ricketts, John Vinycomb, John Leighton and Warrington Hogg and Frank C. Papé. The development in various directions of process work, by facilitating and cheapening the reproduction of beautiful and elaborate designs, has no doubt helped much to popularize the bookplate—a thing which in older days was almost invariably restricted to ancestral libraries or to collections otherwise important. Thus the great majority of plates of the period 1880–1920 plates were reproduced by process. Some artists continued to work with the graver. Some of the work they produce challenges comparison with the finest productions of bygone engravers. Of these the best-known are C. W. Sherborn (see Plate) and G. W. Eve in England, and in America J. W. Spenceley of Boston, Mass., K. W. F. Hopson of New Haven, Conn., and E. D. French of New York City.[21]

Study and collection

Bookplates are often of high interest (and of a value often far greater than the odd volume in which they are found affixed), either as specimens of bygone decorative fashion or as personal relics of well-known people. However the value attached to book plates, otherwise than as an object of purely personal interest, is comparatively modern.[20]

The study and collection of bookplates dates back to around 1860. The first real impetus was given by the appearance of A Guide to the Study of Book-Plates (Ex-Libris), by Lord de Tabley (then the Honorable J. Leicester Warren M.A.) in 1880. This work established what is now accepted as the general classification of styles of British ex-libris: early armorial (i.e., previous to Restoration, exemplified by the Nicholas Bacon plate); Jacobean, a somewhat misleading term, but distinctly understood to include the heavy decorative manner of the Restoration, Queen Anne and early Georgian days (the Lansanor plate is Jacobean); Chippendale (the style above described as rococo, tolerably well represented by the French plate of Convers); wreath and ribbon, belonging to the period described as that of the urn, etc. Since then the literature on the subject has grown considerably.[20]

Societies of collectors were founded, first in England in 1891, then in Germany and France, and later in the United States, most of them issuing a journal or archives: The Journal of the Ex-libris Society (London), the Archives de la Société française de collectionneurs d'ex-libris (Paris), both of these monthlies; the Ex-libris Zeitschrift (Berlin), a quarterly.[20]

In 1901–1903, the British Museum published the catalog of the 35,000 bookplates collected by Sir Augustus Wollaston Franks (1826–97).

Bookplates, of which there are probably far more than a million extant examples worldwide, have become objects of collection. One of the first known English collectors was a Miss Maria Jenkins of Clifton, Bristol, who was active in the field during the second quarter of the 19th century. Her bookplates were later incorporated into the collection of Joseph Jackson Howard.

Some collectors attempt to acquire plates of all kinds (for example, the collection of Irene Dwen Andrews Pace, now at Yale University, comprising 250,000 items). Other collectors prefer to concentrate on bookplates in special fields—for example, coats of arms, pictures of ships, erotic plates, chess pieces, legal symbols, scientific instruments, signed plates, proof-plates, dated plates, plates of celebrities, or designs by certain artists.

Contemporary bookplates and their collection

Since the 1950s, there has been a renewed interest in the collection of bookplates and in many ways a reorientation of this interest. There are still substantial numbers of collectors for whom the study of bookplates spanning 500 years is a fascinating source of historical, artistic and socio-cultural interest. They have however been joined by a now dominant group of new collectors whose interest is more than anything the constitution—at quite reasonable cost—of a miniature, personalized art-print collection. In this miniature art museum, they gather together the works of their favorite artists. They commission numbered and signed editions of bookplates to their name which are never pasted into books but only serve for exchange purposes.

Etching is traditionally the process of using strong acid or mordant to cut into the unprotected parts of a metal surface to create a design in intaglio (incised) in the metal.[1] In modern manufacturing, other chemicals may be used on other types of material. As a method of printmaking, it is, along with engraving, the most important technique for old master prints, and remains in wide use today. In a number of modern variants such as microfabrication etching and photochemical milling it is a crucial technique in much modern technology, including circuit boards.

Techniques

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In traditional pure etching, a metal plate (usually of copper, zinc or steel) is covered with a waxy ground which is resistant to acid.[2] The artist then scratches off the ground with a pointed etching needle[3] where the artist wants a line to appear in the finished piece, exposing the bare metal. The échoppe, a tool with a slanted oval section, is also used for "swelling" lines.[4] The plate is then dipped in a bath of acid, known as the mordant (French for "biting") or etchant, or has acid washed over it.[5] The acid "bites" into the metal (it undergoes a redox reaction) to a depth depending on time and acid strength, leaving behind the drawing (as carved into the wax) on the metal plate. The remaining ground is then cleaned off the plate. For first and renewed uses the plate is inked in any chosen non-corrosive ink all over and the surface ink drained and wiped clean, leaving ink in the etched forms.

The plate is then put through a high-pressure printing press together with a sheet of paper (often moistened to soften it).[6] The paper picks up the ink from the etched lines, making a print. The process can be repeated many times; typically several hundred impressions (copies) could be printed before the plate shows much sign of wear. The work on the plate can be added to or repaired by re-waxing and further etching; such an etching (plate) may have been used in more than one state.[7]

Etching has often been combined with other intaglio techniques such as engraving (e.g., Rembrandt) or aquatint (e.g., Francisco Goya).

History

Origin

The etched carnelian beads in this necklace from the Royal Cemetery of Ur dating to the First Dynasty of Ur (2600-2500 BCE) were probably imported from the Indus Valley.[8]

Etching in antiquity

Main article: Etched carnelian beads

Etching was already used in antiquity for decorative purposes. Etched carnelian beads are a type of ancient decorative beads made from carnelian with an etched design in white, which were probably manufactured by the Indus Valley civilization during the 3rd millennium BCE. They were made according to a technique of alkaline etching developed by the Harappans, and vast quantities of these beads were found in the archaeological sites of the Indus Valley civilization.[9][8][10] They are considered as an important marker of ancient trade between the Indus Valley, Mesopotamia and even Ancient Egypt, as these precious and unique manufactured items circulated in great numbers between these geographical areas during the 3rd millennium BCE, and have been found in numerous tomb deposits.[11] Sumerian kings, such as Shulgi circa 2000 BCE, also created etched carnelian beads for dedication purposes.[12]

Early etching

Main article: Old master print

Etching by goldsmiths and other metal-workers in order to decorate metal items such as guns, armour, cups and plates has been known in Europe since the Middle Ages at least, and may go back to antiquity. The elaborate decoration of armour, in Germany at least, was an art probably imported from Italy around the end of the 15th century—little earlier than the birth of etching as a printmaking technique. Printmakers from the German-speaking lands and Central Europe perfected the art and transmitted their skills over the Alps and across Europe.

Self-portrait etched by Wenceslaus Hollar

Selection of early etched printing plates from the British Museum

The process as applied to printmaking is believed to have been invented by Daniel Hopfer (c. 1470–1536) of Augsburg, Germany. Hopfer was a craftsman who decorated armour in this way, and applied the method to printmaking, using iron plates (many of which still exist). Apart from his prints, there are two proven examples of his work on armour: a shield from 1536 now in the Real Armeria of Madrid and a sword in the Germanisches Nationalmuseum of Nuremberg. An Augsburg horse armour in the German Historical Museum, Berlin, dating to between 1512 and 1515, is decorated with motifs from Hopfer's etchings and woodcuts, but this is no evidence that Hopfer himself worked on it, as his decorative prints were largely produced as patterns for other craftsmen in various media. The oldest dated etching is by Albrecht Dürer in 1515, although he returned to engraving after six etchings instead of developing the craft.[13]

The switch to copper plates was probably made in Italy,[14] and thereafter etching soon came to challenge engraving as the most popular medium for artists in printmaking. Its great advantage was that, unlike engraving where the difficult technique for using the burin requires special skill in metalworking, the basic technique for creating the image on the plate in etching is relatively easy to learn for an artist trained in drawing. On the other hand, the handling of the ground and acid need skill and experience, and are not without health and safety risks, as well as the risk of a ruined plate.

Callot's innovations: échoppe, hard ground, stopping-out

Jacques Callot (1592–1635) from Nancy in Lorraine (now part of France) made important technical advances in etching technique.

Etching by Jacques Bellange, Gardener with basket c. 1612

Callot also appears to have been responsible for an improved, harder, recipe for the etching ground, using lute-makers' varnish rather than a wax-based formula. This enabled lines to be more deeply bitten, prolonging the life of the plate in printing, and also greatly reducing the risk of "foul-biting", where acid gets through the ground to the plate where it is not intended to, producing spots or blotches on the image. Previously the risk of foul-biting had always been at the back of an etcher's mind, preventing too much time on a single plate that risked being ruined in the biting process. Now etchers could do the highly detailed work that was previously the monopoly of engravers, and Callot made full use of the new possibilities.

Callot also made more extensive and sophisticated use of multiple "stoppings-out" than previous etchers had done. This is the technique of letting the acid bite lightly over the whole plate, then stopping-out those parts of the work which the artist wishes to keep light in tone by covering them with ground before bathing the plate in acid again. He achieved unprecedented subtlety in effects of distance and light and shade by careful control of this process. Most of his prints were relatively small—up to about six inches or 15 cm on their longest dimension, but packed with detail.

One of his followers, the Parisian Abraham Bosse, spread Callot's innovations all over Europe with the first published manual of etching, which was translated into Italian, Dutch, German and English.

The 17th century was the great age of etching, with Rembrandt, Giovanni Benedetto Castiglione and many other masters. In the 18th century, Piranesi, Tiepolo and Daniel Chodowiecki were the best of a smaller number of fine etchers. In the 19th and early 20th century, the Etching revival produced a host of lesser artists, but no really major figures. Etching is still widely practiced today.

Variants

Aquatint uses acid-resistant resin to achieve tonal effects.

Soft-ground etching uses a special softer ground. The artist places a piece of paper (or cloth etc. in modern uses) over the ground and draws on it. The print resembles a drawing. Soft ground can also be used to capture the texture or pattern of fabrics or furs pressed into the soft surface.

Other materials that are not manufactured specifically for etching can be used as grounds or resists. Examples including printing ink, paint, spray paint, oil pastels, candle or bees wax, tacky vinyl or stickers, and permanent markers.

There are some new non-toxic grounds on the market that work differently than typical hard or soft grounds.[15]

Further information: William Blake § Relief etching

Relief etching was invented by William Blake in about 1788, and he has been almost the only artist to use it in its original form.[16] However, from 1880 to 1950 a photo-mechanical ("line-block") variant was the dominant form of commercial printing for images. A similar process to etching, but printed as a relief print, so it is the "white" background areas which are exposed to the acid, and the areas to print "black" which are covered with ground. Blake's exact technique remains controversial. He used the technique to print texts and images together, writing the text and drawing lines with an acid-resistant medium.

Carborundum etching (sometimes called carbograph printing) was invented in the mid-20th century by American artists who worked for the WPA.[17] In this technique, a metal plate is first covered with silicon carbide grit and run through an etching press; then a design is drawn on the roughened plate using an acid-resistant medium. After immersion in an acid bath, the resulting plate is printed as a relief print. The roughened surface of the relief permits considerable tonal range, and it is possible to attain a high relief that results in strongly embossed prints.[17]

Printmaking technique in detail

Steps in the typical technique

A waxy acid-resist, known as a ground, is applied to a metal plate, most often copper or zinc but steel plate is another medium with different qualities. There are two common types of ground: hard ground and soft ground.

Hard ground can be applied in two ways. Solid hard ground comes in a hard waxy block. To apply hard ground of this variety, the plate to be etched is placed upon a hot-plate (set at 70 °C, 158 °F), a kind of metal worktop that is heated up. The plate heats up and the ground is applied by hand, melting onto the plate as it is applied. The ground is spread over the plate as evenly as possible using a roller. Once applied the etching plate is removed from the hot-plate and allowed to cool which hardens the ground.

After the ground has hardened the artist "smokes" the plate, classically with 3 beeswax tapers, applying the flame to the plate to darken the ground and make it easier to see what parts of the plate are exposed. Smoking not only darkens the plate but adds a small amount of wax. Afterwards the artist uses a sharp tool to scratch into the ground, exposing the metal.

Relief etching by William Blake, frontispiece to America a Prophecy (Copy A, printed 1795)

Landscape under Trees, etching by Paula Modersohn-Becker, c. 1902

The second way to apply hard ground is by liquid hard ground. This comes in a can and is applied with a brush upon the plate to be etched. Exposed to air the hard ground will harden. Some printmakers use oil/tar based asphaltum[18] or bitumen as hard ground, although often bitumen is used to protect steel plates from rust and copper plates from aging.

Soft ground also comes in liquid form and is allowed to dry but it does not dry hard like hard ground and is impressionable. After the soft ground has dried the printmaker may apply materials such as leaves, objects, hand prints and so on which will penetrate the soft ground and expose the plate underneath.

The ground can also be applied in a fine mist, using powdered rosin or spraypaint. This process is called aquatint, and allows for the creation of tones, shadows, and solid areas of color.

The design is then drawn (in reverse) with an etching-needle or échoppe. An "echoppe" point can be made from an ordinary tempered steel etching needle, by grinding the point back on a carborundum stone, at a 45–60 degree angle. The "echoppe" works on the same principle that makes a fountain pen's line more attractive than a ballpoint's: The slight swelling variation caused by the natural movement of the hand "warms up" the line, and although hardly noticeable in any individual line, has a very attractive overall effect on the finished plate. It can be drawn with in the same way as an ordinary needle.

The plate is then completely submerged in a solution that eats away at the exposed metal. ferric chloride may be used for etching copper or zinc plates, whereas nitric acid may be used for etching zinc or steel plates. Typical solutions are 1 part FeCl3 to 1 part water and 1 part nitric to 3 parts water. The strength of the acid determines the speed of the etching process.

The etching process is known as biting (see also spit-biting below).

The waxy resist prevents the acid from biting the parts of the plate which have been covered.

The longer the plate remains in the acid the deeper the "bites" become.

Example of etching

During the etching process the printmaker uses a bird feather or similar item to wave away bubbles and detritus produced by the dissolving process, from the surface of the plate, or the plate may be periodically lifted from the acid bath. If a bubble is allowed to remain on the plate then it will stop the acid biting into the plate where the bubble touches it. Zinc produces more bubbles much more rapidly than copper and steel and some artists use this to produce interesting round bubble-like circles within their prints for a Milky Way effect.

The detritus is powdery dissolved metal that fills the etched grooves and can also block the acid from biting evenly into the exposed plate surfaces. Another way to remove detritus from a plate is to place the plate to be etched face down within the acid upon plasticine balls or marbles, although the drawback of this technique is the exposure to bubbles and the inability to remove them readily.

For aquatinting a printmaker will often use a test strip of metal about a centimetre to three centimetres wide. The strip will be dipped into the acid for a specific number of minutes or seconds. The metal strip will then be removed and the acid washed off with water. Part of the strip will be covered in ground and then the strip is redipped into the acid and the process repeated. The ground will then be removed from the strip and the strip inked up and printed. This will show the printmaker the different degrees or depths of the etch, and therefore the strength of the ink color, based upon how long the plate is left in the acid.

The plate is removed from the acid and washed over with water to remove the acid. The ground is removed with a solvent such as turpentine. Turpentine is often removed from the plate using methylated spirits since turpentine is greasy and can affect the application of ink and the printing of the plate.

Spit-biting is a process whereby the printmaker will apply acid to a plate with a brush in certain areas of the plate. The plate may be aquatinted for this purpose or exposed directly to the acid. The process is known as "spit"-biting due to the use of saliva once used as a medium to dilute the acid, although gum arabic or water are now commonly used.

Pornocrates by Félicien Rops. Etching and aquatint

A piece of matte board, a plastic "card", or a wad of cloth is often used to push the ink into the incised lines. The surface is wiped clean with a piece of stiff fabric known as tarlatan and then wiped with newsprint paper; some printmakers prefer to use the blade part of their hand or palm at the base of their thumb. The wiping leaves ink in the incisions. You may also use a folded piece of organza silk to do the final wipe. If copper or zinc plates are used, then the plate surface is left very clean and therefore white in the print. If steel plate is used, then the plate's natural tooth gives the print a grey background similar to the effects of aquatinting. As a result, steel plates do not need aquatinting as gradual exposure of the plate via successive dips into acid will produce the same result.

Colored etching and aquatint on paper

A damp piece of paper is placed over the plate and it is run through the press.

Nontoxic etching

Growing concerns about the health effects of acids and solvents[19][20] led to the development of less toxic etching methods[21] in the late 20th century. An early innovation was the use of floor wax as a hard ground for coating the plate. Others, such as printmakers Mark Zaffron and Keith Howard, developed systems using acrylic polymers as a ground and ferric chloride for etching. The polymers are removed with sodium carbonate (washing soda) solution, rather than solvents. When used for etching, ferric chloride does not produce a corrosive gas, as acids do, thus eliminating another danger of traditional etching.

The traditional aquatint, which uses either powdered rosin or enamel spray paint, is replaced with an airbrush application of the acrylic polymer hard ground. Again, no solvents are needed beyond the soda ash solution, though a ventilation hood is needed due to acrylic particulates from the air brush spray.

The traditional soft ground, requiring solvents for removal from the plate, is replaced with water-based relief printing ink. The ink receives impressions like traditional soft ground, resists the ferric chloride etchant, yet can be cleaned up with warm water and either soda ash solution or ammonia.

Anodic etching has been used in industrial processes for over a century. The etching power is a source of direct current. The item to be etched (anode) is connected to its positive pole. A receiver plate (cathode) is connected to its negative pole. Both, spaced slightly apart, are immersed in a suitable aqueous solution of a suitable electrolyte. The current pushes the metal out from the anode into solution and deposits it as metal on the cathode. Shortly before 1990, two groups working independently[22][23] developed different ways of applying it to creating intaglio printing plates.

In the patented[24][25] Electroetch system, invented by Marion and Omri Behr, in contrast to certain nontoxic etching methods, an etched plate can be reworked as often as the artist desires[26][27][28][29] The system uses voltages below 2 volts which exposes the uneven metal crystals in the etched areas resulting in superior ink retention and printed image appearance of quality equivalent to traditional acid methods. With polarity reversed the low voltage provides a simpler method of making mezzotint plates as well as the "steel facing"[30] copper plates.

Some of the earliest printmaking workshops experimenting with, developing and promoting nontoxic techniques include Grafisk Eksperimentarium, in Copenhagen, Denmark, Edinburgh Printmakers, in Scotland, and New Grounds Print Workshop, in Albuquerque, New Mexico.

Photo-etching

Main article: Photochemical machining

Light sensitive polymer plates allow for photorealistic etchings. A photo-sensitive coating is applied to the plate by either the plate supplier or the artist. Light is projected onto the plate as a negative image to expose it. Photopolymer plates are either washed in hot water or under other chemicals according to the plate manufacturers' instructions. Areas of the photo-etch image may be stopped-out before etching to exclude them from the final image on the plate, or removed or lightened by scraping and burnishing once the plate has been etched. Once the photo-etching process is complete, the plate can be worked further as a normal intaglio plate, using drypoint, further etching, engraving, etc. The final result is an intaglio plate which is printed like any other.

Types of metal plates

Main article: Photochemical machining

Copper is a traditional metal, and is still preferred, for etching, as it bites evenly, holds texture well, and does not distort the color of the ink when wiped. Zinc is cheaper than copper, so preferable for beginners, but it does not bite as cleanly as copper does, and it alters some colors of ink. Steel is growing in popularity as an etching substrate. Increases in the prices of copper and zinc have steered steel to an acceptable alternative. The line quality of steel is less fine than copper, but finer than zinc. Steel has a natural and rich aquatint.

The type of metal used for the plate impacts the number of prints the plate will produce. The firm pressure of the printing press slowly rubs out the finer details of the image with every pass-through. With relatively soft copper, for example, the etching details will begin to wear very quickly, some copper plates show extreme wear after only ten prints. Steel, on the other hand, is incredibly durable. This wearing out of the image over time is one of the reasons etched prints created early in a numbered series tend to be valued more highly. An artist thus takes the total number of prints he or she wishes to produce into account whenever choosing the metal.

Industrial uses

Main article: Chemical milling

See also: Etching (microfabrication)

Etching is also used in the manufacturing of printed circuit boards and semiconductor devices, and in the preparation of metallic specimens for microscopic observation.

Prior to 1100 AD, the New World Hohokam culture independently utilized the technique of acid etching in marine shell designs.[31] The shells were daubed in pitch and then bathed in acid probably made from fermented cactus juice.[32]

Controlling the acid's effects

Young Girl in cafe with street-view, etching by Lesser Ury, 1924

There are many ways for the printmaker to control the acid's effects.

Hard grounds

Most typically, the surface of the plate is covered in a hard, waxy 'ground' that resists acid. The printmaker then scratches through the ground with a sharp point, exposing lines of metal which the mordant acid attacks.

Example of sugar lift and spit bite effect

Aquatint

Aquatint is a variation giving only tone rather than lines when printed. Particulate resin is evenly distributed on all or parts of the plate, then heated to form a screen ground of uniform, but less than perfect, density. After etching, any exposed surface will result in a roughened (i.e., darkened) surface. Areas that are to be light in the final print are protected by varnishing between acid baths. Successive turns of varnishing and placing the plate in acid create areas of tone difficult or impossible to achieve by drawing through a wax ground.

Sugar lift

Designs in a syrupy solution of sugar or Camp Coffee are painted onto the metal surface prior to it being coated in a liquid etching ground or 'stop out' varnish. When the plate is placed in hot water the sugar dissolves, leaving the image. The plate can then be etched.

Spit bite

A mixture of nitric acid and Gum Arabic (or, almost never, saliva) which can be dripped, spattered or painted onto a metal surface giving interesting results. A mixture of nitric acid and rosin may also be used.

Printing

Cylinder press for printing etchings

Printing the plate is done by covering the surface with printing ink, then rubbing the ink off the surface with tarlatan cloth or newsprint, leaving ink in the roughened areas and lines. Damp paper is placed on the plate, and both are run through a printing press; the pressure forces the paper into contact with the ink, transferring the image (c.f., chine-collé). Unfortunately, the pressure subtly degrades the image in the plate, smoothing the roughened areas and closing the lines; a copper plate is good for, at most, a few hundred printings of a strongly etched imaged before the degradation is considered too great by the artist. At that point, the artist can manually restore the plate by re-etching it, essentially putting ground back on and retracing their lines; alternatively, plates can be electro-plated before printing with a harder metal to preserve the surface. Zinc is also used, because as a softer metal, etching times are shorter; however, that softness also leads to faster degradation of the image in the press.

Faults

Example of foul bite in acid etching

Foul-bite or "over-biting" is common in etching, and is the effect of minuscule amounts of acid leaking through the ground to create minor pitting and burning on the surface. This incidental roughening may be removed by smoothing and polishing the surface, but artists often leave faux-bite, or deliberately court it by handling the plate roughly, because it is viewed as a desirable mark of the process.

"Etchings" euphemism

The phrase "Want to come up and see my etchings?" is a romantic euphemism by which a person entices someone to come back to their place with an offer to look at something artistic, but with ulterior motives. The phrase is a corruption of some phrases in a novel by Horatio Alger Jr. called The Erie Train Boy, which was first published in 1891. Alger was an immensely popular author in the 19th century—especially with young people—and his books were widely quoted. In chapter XXII of the book, a woman writes to her boyfriend, "I have a new collection of etchings that I want to show you. Won't you name an evening when you will call, as I want to be certain to be at home when you really do come." The boyfriend then writes back "I shall no doubt find pleasure in examining the etchings which you hold out as an inducement to call."

This was referenced in a 1929 James Thurber cartoon in which a man tells a woman in a building lobby: "You wait here and I'll bring the etchings down".[33] It was also referenced in Dashiell Hammett's 1934 novel The Thin Man, in which the narrator answers his wife asking him about a lady he had wandered off with by saying: "She just wanted to show me some French etchings."[34]

The phrase was given new popularity in 1937: in a well publicized case, violinist David Rubinoff was accused of inviting a young woman to his hotel room to view some French etchings, but instead seducing her.

As early as 1895, Hjalmar Söderberg used the reference in his "decadent" début novel Delusions (swe: Förvillelser), when he lets the dandy Johannes Hall lure the main character's younger sister Greta into his room under the pretence that they browse through his etchings and engravings (e.g., Die Sünde by Franz Stuck).[35]

See also

Acid test (gold)

Electroetching

List of art techniques

List of printmakers

Old master prints for the history of the method

Photolithography