Our special formula primary yellow tempera has unique properties not found in conventional temperas, you can even paint on most glossy surfaces like glass and plastic. True primary colors are ideal for teaching color mixing and color theory. This heavy-bodied opaque paint will not run or settle, and is freeze-thaw stable. Can be painted over once coat is dried. Comes in a safe plastic container. Paint is non-toxic, chip-resistant and opaque. Made in the USA.