This is the classic "solar paper" that makes beautiful pictures by placing objects on the paper and exposing it to the sun. The paper undergoes a chemical change when exposed to sunlight. Save the print by soaking in water then drying. On back-order. Made in the USA. Ages 6 to Adult. Contains 15 sheets, 20 X 30 cm or approx. 8" X 12". Students and Teachers project tip! A great art project as well as a solar educational tool. With this paper you can also demonstrate UV blocking sunscreen by smearing sunscreen on the plexiglass and exposing the paper to the sun. Use different strengths of sunscreen and see how the image has changed.