What is Terra Firma?
In the CFE Color System it is used as an enhancement product.
Terra Firma is a Special clay based product that has been fritted. The special effects techniques will often take on a pearly or metallic appearance in or under the color..
Terra Firma is used to create a colored opaque underglaze. First, we recommend that if possible you create a colored opaque underglaze using the liquid clay body from which the ware was cast, but that is not always possible. CSP20 Terra Firma can be substituted for Slip as a second best alternative. You can refer to the Engobe page for basic mix to create an opaque underglaze for greenware or bisque.
Terra Firma is also used for an Aged Metal effect around the borders of trays and to create design areas on vases, etc… Aged Metal is an application technique with a finished surface that is a semi-rough matt. There can be elements of a satin metallic finish in areas. This is a water tight finished glaze. This application is perfect for any ware that you would lend itself to an antique metal finish. A warm patina for garden pieces… planters.. frames, boxes, jardinières, etc.
Refer to specialty techniques on next page for ideas. All of these can be found in detail on the Colors for Earth web site. Your imagination is your limitation on what you can create.