This document discusses ceramic colours, bonding frits, and fritted traces. It provides information on enamel colours, overglaze colours, and stains for glazes that are stable at different high temperatures. It also discusses bonding frits, which are glass-like ceramic materials that are used to bind abrasive materials in grinding wheels. Bonding frits form a hard ceramic mass that embeds abrasive grains. The document additionally describes fritted traces, which are glassy granules that contain essential trace elements, like vitamins, that plants need for full health and growth. Fritted traces are sparingly soluble so plants only get the required amount of elements and the grains do not easily wash away from