Using Safety Pickle
Directions for use and information on safety pickle
This
safety pickle has been formulated for the removal of oxides from the
surface of precious metal components after casting, soldering, annealing
and any other processes involving heat. It is an ideal alternative to
the dangerous acids normally used. Directions:
Heat 1 litre of tap water to approximately 50°C (122°F) in a container
capable of resisting acids and caustic solutions (a chemical or
polypropylene container is recommended, although glass, most glazed
china and most plastics are fine). Add approximately 50g of the granules
to the water (always add pickle to water, not water to pickle) and stir
with a wooden spoon or spatula. To mix a smaller amount, use 250ml of
water (approximately 1 cup) and add 12.5g of crystals (approximately 2
level teaspoons).
Components to be
deoxidised should be immersed in the solution, which should be
maintained at 50°C if possible (the heat speeds up the process but is
not entirely necessary ) and left overnight. Always
use plastic, brass or copper tweezers as steel can contaminate the
solution, causing a chemical reaction which can copper plate your
sterling silver. Also make sure all binding wire is removed as this will
have the same reaction.
Goggles or safety glasses should be
worn and any splashes washed off immediately-see below for precautions.
Identification of material: Safety Pickle: White powder / flakes / spheres with a light sulphur aroma.
Composition:
Sodium hydrogen sulphate (a modified salt based predominately on sodium
bisulphate). The product is not corrosive if kept dry, but in damp or
wet conditions it readily absorbs water, forming an acidic liquid which
is mildly corrosive when in contact with skin, eyes or by ingestion or
inhalation.
Hazards identification:
Inhalation: Mildly corrosive if inhaled
Ingestion: Can be mildly corrosive
Skin Contact: Can be mildly corrosive and cause skin ulceration and dermatitis.
Eye Contact: Can be mildly corrosive and cause corneal necrosis and conjunctivitis.
First aid measures:
Skin Contact: Wash of with soap and water
Eye Contact: Irrigate immediately with lots of plain water and seek medical attention if required.
Inhalation: Remove to fresh air
Ingestion: Rinse mouth out and drink plenty of water.
Fire fighting measures: Not
considered flammable. Extinguishing media dependant on other
constituents of fire. May give off sulphur dioxide fumes so wear
breathing apparatus.
Spillage / disposal:
No specific precautions required. Sweep up powder and collect in a
suitable container.
Handling / storage: No specific precautions required but, when handling, wear protective mask, gloves, goggles and non-absorbent clothing.
Every
effort has been made to ensure that the information on this leaflet is
reliable but we cannot accept liability for any loss, damage or injury,
which may result from its use. Data given in this leaflet is solely for
guidance in safe handling and use of its product - it does not form part
of any specification.
If you have any queries or concerns not covered here, please do not hesitate to contact us.