A hobby sized 4oz. bottle of glass etching cream for etching dichroic and iridized glass. This etching cream is used in creating your own patterns in dichroic glass as featured in Tanya Veit's webinar hosted by Glass Art Patterns magazine. A little goes a long way and a 3oz. bottle is perfect for your glass art needs. Follow manufacturer's instructions written on bottle. Etchall etching crème is a re-usable crème that produces a white opaque, 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.