Cyanotype is an antique photographic printing process, developed in the mid 1800's and distinctive for its rich blue color. Jacquard's high-quality cotton sateen fabric sheets come pre-sensitized for cyanotype and ready to use, making sun printing easier than ever before. Just pull a sheet out of the package, place objects or film on top, expose to light, rinse and dry and you'll have a rich, detailed print. Place objects on the fabric to block the light: anywhere the sunlight doesn't touch will remain white and leave a photographic impression on the fabric. You can even make prints from drawings by first drawing on a transparency. The possibilities are endless! This package contains thirty 8.5x11 inch sheets of pretreated cotton fabric. Made in the USA.