This is a fabulous, ready-to-use mould-making material in powder form. Ideal for making Pate de Verre and casting moulds.
Hydracast ART - 25kg Sack
ART has a very fine grain and reproduces fine detail in the original. For 'lost-wax' casting, moulds can be de-waxed with steam (for example, using a wallpaper steamer). For glass weights from 1-2 kg.
Please note that moulds made from Hydracast ART are one-off moulds, and cannot be re-used.
Hydracast ART is a ready-to-use material in powder form, for making Pate de Verre and casting moulds. It has a very fine grain and reproduces fine detail in the original. If using for 'lost-wax' casting you can de-wax with vapour using, for example, a wallpaper steamer. For glass weights 1-2 kg.
Hydracast CRIST has much the same characteristics as ART but is for heavier glass weights, from 2-60 kg.
Instructions for Use
Both products can be mixed either in free-air or under vacuum, as follows:
Mixing under Air:
The powder to water ratio is 1kg / 350cm3.
Ambient temperature should be 20oC or 68oF, if possible.
Always add the powder to the water, not the other-way-round. Gently sift the powder into the water between the fingers from above, allowing the water to absorb all of the weighed powder before starting to mix.
Once all the powder is introduced to the water, and wearing a pair of rubber gloves, slowly begin to mix the Hydracast and water together. Spread your hand under the surface and gently agitate from side-to-side being careful not to introduce air into the mixture. Mix in this way for about 6 minutes, no longer as the mixture will begin to set.
Once mixed pour the liquid slowly into the mould container, down the side of the mould-positive, being careful not to introduce any air into the mixture. Leave the mould for approximately 20 minutes until set. Setting time is shorter in Summer (10-15 minutes) and longer in Winter (17-22 minutes).
Mixing under Vacuum:
The mixing time will be 5 to 6 minutes with a powder to water ratio of 1kg / 340 cm3 (1kg / 330 cm3 in Winter).
Drying of Moulds:
Allow the mould to airdry for between 6-24 hours before attempting to remove the positive material.