Product Description
Silica Free Smooth Casting Investment Powder
For those who do not wish to work with products containing crystobolite, the Silica-Free powder is the way to go. This product is easy to mix and pour perfectly into the Ring Pellet Molds, which you can use to create cores or stoppers for metal clay rings, place a stopper inside the ring when firing to control the shrinkage.
Also use as a placeholder for heat-sensitive stones during firing.
Use this easy to mix smooth silica free casting powder to;
- cast ring pellet sizers and firing shrinkage stoppers for metal clay rings
- bezel placeholder for cabochons or other bezel components.
TOP TIP
Mix your investment in a strong grip seal bag and snip a corner off to fill bezels or ring pellet moulds (like using a frosting bag) - no need to clean out containers or risk getting any investment into plumbing as you can just throw away the bag when finished!
USE AS A PLACE HOLDER FOR STONES THAT CAN'T BE FIRED IN PLACE:
- To create a placeholder for a bezel set stone, create a traditional bezel (using bezel wire) for your chosen stone. Fuse the seam with a torch. Check the stone fits well - it should be snug, but come out of the bezel easily. However there shouldn’t be gaps around the stone.
- The bezel can be pressed into the clay (careful not to go too deep or it will tear during firing, make sure it’s at least 1.2mm (5 cards) thick for a pressed in bezel), or set the bezel on top of the clay and add a rope of syringe or clay around the bezel to keep it in place.
- Cut away most of the clay inside the bezel, while leaving enough for a rim to hold the stone in place so it does not fall through.
- Press the stone back into the setting carefully, and let the clay dry to leather hard with the stone in place.
- Once dry, remove the stone by pressing it out from the back very carefully with a tool that that won't damage the stone, or use a wax stick to lift the stone from the front.
- Mix enough investment to fill the space inside the bezel, and pour it into the cavity.
- Allow to dry completely.
- Once dry, fire the silver as normal with the investment still in place.
- After firing, once your piece has cooled, dissolve the investment in water. Then your piece is ready to finish and polish as usual.
We recommend always wearing a mask when using casting powder.
**Please Note** Do not pour unused casting powder down the drain. It will stick to your pipes and cause a blockage. Instead, wipe out your freshly used mixing container with a damp paper towel, or rinse off your container outside.
Contains 1lb (453g)
Instructions included inside the box - please follow the side which does not mention containing silica.
