Composition leaf, also known as imitation leaf or Dutch gold, is made from brass and a combination of zinc and copper. It is approximately 0.3 microns thick. Each book contains 25 leaves measuring 5-1/2″ x 5-1/2″. Composition leaf is sensitive to UV light, humidity and temperature changes, so it should be stored in the original packaging in a dark place, optimally at 20 C (68 F). Composition leaf is an easy way to add a touch of elegance to any project. Composition leaf is available in a variety of colors, including Veriegated Blue.