Tri-Color Gum Bichromate Open Studio
Art Intersection 207 N Gilbert Rd # 210, GilbertTri-Color Gum Bichromate The 19th century photographic process of gum bichromate uses color separation negatives to make multilayered, tri-color prints on watercolor paper. An emulsion mixture of watercolor pigment, potassium dichromate, and […]
