Mona Lisa metal leafing products are made from the finest German materials and are recognized as some of the best metal leafing metals available Perfect for home decor decoupage or stenciling Use it on wood ceramic metal plaster of paris glass plastic and paper Basic instructions included Sheets are 5 1 2 in x 5 1 2 in Composition Gold Leaf is made up of copper and zinc which when combined closely resemble the pure finish of authentic gold metals Imitation gold will darken antique if left uncoated The imitation silver is made from aluminum and will not tarnish or fade Because the copper leaf is genuine it will tarnish and patina when exposed to certain chemicals--coating can prevent this Mona Lisa Metal Leaf comes in packs of 25 sheets