- 4-ounce jar of Jacquard Potassium Ferricyanide - Red salt used in conjunction with Ferric Ammonium Citrate to create sensitizer for Cyanotype printing - Ancient photographic process used since the mid-19th century - Ideal for producing monochromatic prints in Prussian blue - Simple process that uses two inexpensive chemicals and sunlight/UV light - Compatible with natural fibers such as paper, cotton, silk, wool, wood, among others - Measurements: 5.715 cm (width) x 6.35 cm (height) x 5.842 cm (length) - Weight: 0.14061363470000002 kg