1kg Silicone + water clear casting resin kit+Plus 500g Mouldcraft GP-RTV 325 silicone mould making kit 500g of Mouldcraftwater© water clear casting resin 10g silicone catalyst 30g MEPK Catalyst / Hardener 10ml Syringe 4 x 600cc calibrated cups 4 pair of latex gloves 4 mixing sticks Standard curing agent for Polyester water clear casting Resins use between 2-3%. Silicone mix ratio is 100-2 Please handle very carefully
Mouldcraftwater© resin is used to make paperweights, preserve medical and biological specimens, and is widely and successfully used in the making of costume jewellery. Water Clear Casting Resin can also be used by modellers to make ponds and streams or various water effects in landscapes. Basic guidelines:
Add the required amount of catalyst to the measured amount of resin and pour into the mould (see our reusable moulds section) to form the base layer, when this reaches to a firm consistency you can place the specimen on it and pour a small amount of resin around it, bearing in mind a very light specimen will want to float so you will need to glue it down with a very small amount of resin. In very small castings it is quite common to cast in one hit with very good results. Please do not forget that large castings will generate an exothermic reaction (heat build up), which may crack and discolour. When you have finished casting the final layer wait until it has gelled (starting to set), then cover with a layer of cellophane to exclude the air, otherwise it may set with a tacky surface. When the casting is hardened, best to leave overnight, you can then remove it from the mould and polished if necessary.
You can design many different effects with Water Clear Casting Resin: If you are casting in stages the base layer can be pigmented (see our Transparent pigment section) a different colour, and the subsequent layers clear or a variety of colours. You will need only a very tiny amount of pigment for an effective colouring, experimentation is the key to success, never use more than 5% by volume as this will effect the curing process, in many cases 1% is adequate in clear casting.
Preparation before Clear Casting:
Flowers, leaves ect: These specimens must be thoroughly dried first. This can be achieved by placing in a container and filling with either silica gel crystals or dry fine silver sand, then leaving to dry for several days in a warm area. After the drying out they should be sealed with polyurethane varnish or hair lacquer, bearing in mind each different plant may take longer to dry than others, the water content taken from a flower may cause it to fade also. It is sometimes a good idea to dip the specimen in uncatalysed resin and leave overnight to drain off.
Insects: You must remove all the natural oils present by dipping into a grease solvent such as Acetone (please be aware the Acetone is highly flammable). Leave the specimen to dry completely and dip in uncatalysed resin, then leave overnight to drain.
Paper items: Seal with a thin coat of polyurethane varnish or hair lacquer.
Medals, Coins, Stones and Shells: Wash thoroughly to remove dirt and grease then also dip in uncatalysed resin, then leave overnight to drain.
SILCONE GP-RTV 325 THIS IS A SHORE 25 OUR RANGE IS FROM 20 BEING THE SOFTEST TO A SHORE 60 THE HARDEST SILICONE WE HAVE This Silicone has been formulated for easy mixing by hand, with colour coded components giving a visual aid to ensure mixing is adequate. The two components mix easily and because of the low viscosity most grades can be used without processing in a vacuum chamber. This silicone is suited for the detailed reproduction of figures, art objects and similar items. Features : - Outstanding release properties
- High flowability and long working time
- Medium Hardness
- High tear resistance
- High elasticity for easy removal of complex replica parts
- Can be made thixotropic (non flow able) for vertical surface replication
Cured Properties of Silicone - Colour : white silicone /redish catalyst
- Mix Ratio : 100:2 so example 100g of catalyst to 2g of catalyst
- Working Time : 20-40 Minutes
- De-Mould Time : 12-24 Hours
- Mixed Viscosity mPas : 18000
- Hardness Shore A : 25
- Tensile Strength Mpa : 3.0
- Elongation @ Break % : 520
- Tear Strength kN/m : 23
- Linear Shrinkage & : 0.2-0.4
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