Glass colors are used for the decoration of flat glass to be tempered. For maturing and gaining their physical and chemical resistance they should be cured at 680°C for at least 3-4 minutes or common firing cycle for tempering should be followed. The thickness of the glass is important when choosing the firing period.
These colors have very good temperature resistivity so most of them can be used for high temperature applications on glass and ceramics.

Glass colors have very attractive colors and they can be mixed with each other. Thus, almost all color shades can be reached. If cadmium containing red, orange and yellow colors are going to be mixed with white in the ratio 1/1 or more,at least 50 % of the white to be used should be cadmium white, otherwise the color will be damaged.

These colors contain lead in their composition, however, when correctly applied and fired, solubility of lead is very low, but still these colors are not intended for being used on kitchen ware which will directly contact with acid containing foods.
Glass colors are provided in powder form or as color pastes prepared with a suitable medium. Color pastes must be stored in tightly closed containers and must be stirred well before use.

Recommended mesh sizes for screen printing : 70-90 threads/cm
Recommended medium / powder ratio : 30-40 / 100
Never use thinner for diluting purpose of color pastes which are prepared with oil based medium. If dilution is required use its original medium or any synthetic oil based medium by testing before.

Powders must be stored in dry conditions, if they gether moisture, problems may arise especially when using with an oil based medium.

All ceramic pigments and paints are due to crystal structures resulting from chemical reactions between some chemical compounds. They shouldn’t be inhaled or swallowed.