etchall® etching crème is a re-usable etching crème that produces a white opaque, permanent etched surface on glass, mirror, ceramic, porcelain, marble and slate. etchall can be use on large areas like a shower door or on a small area like a name on a wine glass. Gives a matte smooth finish with clean sharp edges and "tooth" for painting, inking, rubber stamping, etc. The Art and Craft Material Institute has approved etchall® etching creme to be used by children 12 years and older, children under 12 years can use etchall under the supervision of their parents. It conforms to ASTM-D4238.