Place any object or transparency on the Sunography paper, expose it in bright sunlight, and rinse to reveal a print. Sunography is light sensitive on both sides which allows for two-sided prints. This set includes five 3" x 5" cards in an assortment of five bright colors. The cards are made from 100lb hot press paper so they are thick and sturdy. The smooth finish makes finely detailed prints on both sides of the card.