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. Here’s how it works: when the cyanotype fabric is exposed to sunlight, a chemical reaction occurs. It won’t reveal itself, though, until you put the fabric in water. Then it will instantly turn blue!