CAC Terra Sigillata

Terra Sigillata (or Terra Sig) literally means “Earth Seal”. Terra Sig is a very fine slip created by a process of separation. We mill specially selected clays using a ball mill and water until the particles are extremely small and fine. Deflocculant is added and the mixture is allowed to settle for up to 48 hours. The fluid left on top after settling is the terra sigillata which is then decanted and bottled.

CAC produces a multiple varieties of Terra Sig. Our Classic series is based on a selection of kaolins to achieve different colors. Our Colored series is based on our OM4 Terra Sig recipe and brings a range of colors into play. We have a new line of Mica Infused Terra Sig that brings the iridescent sparkle and shine of mica to your pots. Our Mica Sig is available in metallic opaque colors or interference “blushing” colors. Each with their own unique luster and shine.

After applying multiple layers to bone dry greenware polishing with your hands or a soft cloth will shine the surface of the terra sig to a high gloss. This smooth surface is ideal for many different decoration techniques. After firing you will have a smooth and somewhat weather resistant coating. Terra Sig is not food safe due to it’s surface characteristics and is also not waterproof.

May be fired to any temp but the polished surface will start to break down and lose it’s shine when fired over Cone 04.