Glass decoration paints are made up of pigments and low melting point frit (fluss). The cover paints of series 33 are suitable for decorating soda-lime glasses; they are suitable for use on lead glass with limitations. The paint may be applied with brush or by direct or indirect screen printing. The powder paint needs to be mixed with a carrier material (oil) depending on the way it is to be applied. The firing temperature depends on the object to be decorated. The usual firing temperature is in the range of 520-580 ºC; thin-walled objects should be fired at lower temperatures for shorter times. The higher the temperature the better the decoration's chemical and mechanical resistance but even well-fired decorations are not dishwasher resistant. These paints contain lead – they are not suitable for decorating surfaces coming into contact with foodstuffs.