Vitrea 160 glass paint markers by Pebeo are non-toxic and water-based, and are available in a round (1.2 mm) tip size, ideal for tracing, drawing, outlining and writing. Great choice of colours, which are miscible with one another and are set by heat for working on glass. Vitrea 160 markers are easy to use and can be used by children. Declined in shiny or frosted finishes. They can be applied to glass or crystal, or on any other surfaces capable of withstanding a temperature of 160 °C (325F). Use: After a 24-hour drying period, place the painted glass in a cold oven. Once a temperature of 160 °C (325F) has been reached, bake for 40 minutes. Care: Clean with soapy water. Supports: Glass, crystal, porcelain, etc. Drying time: A few minutes for the surface, 24 hours minimum throughout. Notes: Colours shows excellent resistance to dishwashing, alcohol, solvents and usual detergents.