Cyanotype is the “original” sun-printing process, one of the earliest photographic techniques. Harness the power of the sun to make detailed prints from virtually any object that casts a shadow: tools, toys, plants, leaves, stones, sand, string, lace, etc. Simply place the object on the sensitized surface and expose to sunlight (UV). Use a digitally-printed photographic negative (an inverted black and white photo inkjet-printed onto a transparency*) instead of an object to create full-resolution photographs on paper or fabric. Capture the nuance of every shadow—a fun group activity for any age! Set includes 2—0.8 oz/22.68 g bottles (1 each of the following): Part A: Potassium Ferricyanide—A red iron salt used with Ferric Ammonium Citrate for cyanotype. Part B: Ferric Ammonium Citrate—A light-sensitive iron salt used with Potassium Ferricyanide for cyanotype.