These exceptional water-based paints can be applied to any heat-stable surface —porcelain, crockery, terra-cotta, metals, ceramics, glass, etc. Fire them in a home oven at 300°F for 30 minutes for a finish that's as permanent as baked enamel. Pebeo's professional range of 47 lightfast colors blend beautifully with one another and thin with water or medium. Once fired, Porcelaine 150 colors are safe for common detergents and solvents, dishwasher (top rack), and outdoor use. Non-toxic. Porcelaine 150 colors are not intermixable with Pebeo Vitrea 160, and they heat set at different temperatures. Whereas Porcelaine 150 colors are solid, Vitrea 160 colors achieve more of a fused glass or blown glass look. Pebeo recommends that you use a soft, natural fiber brush, such as a squirrel hair quill or a red sable watercolor brush, to apply Porcelaine 150. A soft brush will have the right consistency for the paint, and is less likely to leave brush marks. Individual colors and mediums are packaged in 45 ml (1.5 oz) bottles. Porcelaine 150 outliners are packaged in 20 ml (.68 oz) squeeze tubes. To heat set a finished piece, place it in a 300°F (149°C) oven for 30 minutes. Since many vitreous and ceramic materials cannot withstand sudden changes in temperature, we recommend that you place your piece in a room temperature oven and allow it to warm up with the oven. After 30 minutes, turn the oven off and allow it to cool back to room temperature gradually. Avoid use of strong, abrasive cleaners such as steel scouring pads, and sharp cutting implements such as stainless steel knives, which may leave scratches on the surface and make it more difficult to clean. Not recommended for use on surfaces that come in contact with food. Many of the transparent and semi-transparent colors, as shown in the color charts, appear quite dark. Names of colors often reflect the special qualities that colors take on when light passes through. Mediums — Matte and Gloss mediums modify the appearance of the finished surface. Undercoat White — Porcelaine 150 Undercoat improves adhesion on porous surfaces. Outliners — Available in selected colors, Porcelaine 150 outliners have a thicker consistency, creating a raised surface. They are packaged in 20 ml (.68 oz) squeeze tubes.