Using Cernit Silicone Moulds with Polymer Clay
Use well conditioned polymer clay and roll into a small ball before pressing it firmly into the mould. If using firmer clay (eg Kato or Fimo Professional) fill the silicone mould with little pieces of clay at a time, pushing it down into small crevices of the mould. Continue adding until the mould is full. Give it a final firm pressing using your thumb. Make sure the mould is full. It is perfectly fine to use a blade to carefully shave or slice off any clay that is too high for the mould. You want a nice level back!
Polymer clay can either be baked right in the mould or if making multiple quantities, unmould the pieces onto a tile before baking. To unmould, turn the mould over onto a tile. The clay will naturally stick to a glossy ceramic tile. Press the back of the mould and then as you lift, flex the mould to ease the moulded piece out. At this stage you can add any decorative effects like powders, pastels, additional clay, paint etc.to the unmoulded clay piece.
If the clay is sticking to the mould, use a release such as a spritz of water (not with Fimo) or talc or cornflour brushed lightly onto the mould. For decorative effects – mica powder brushed into the mould doubles as decoration and a release.
For self-hardening clays: wait until fully dry before removing from the mould.
Using Cernit Silicone Moulds with Resin
Protect yourself with gloves and an appropriate mask when working with epoxy resin. Use a mould release if you have one. They extend the life of your moulds. Pour the resin. Remove bubbles by blowing through a straw. Add inclusions if using them. Leave to cure in accordance with the directions for the resin you are using.
To remove castings, work from the outside carefully peeling back the mould slightly to remove the casting.
Wash the mould with soap and water. Once dry, store flat (essential it is flat) in a sealed bag to prolong its life.
Tip: Don’t use anything sharp like a needle tool that may damage the mould.