etchall Etching Creme (4 oz) Re-usable! Creates a permanent etched finish on glass, mirror, ceramic, porcelain, marble and slate. 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. NOTE: The summer heat causes the product turn a darker caramel color than the usual white. The color of the product does not affect usability or performance; dark etchall is still good etchall!