Gum Bichromate Alternative Photo-printing Workshop

Conducted by Tanima Das Gum bichromate is a 19th century a alternative photographic printing process using gum arabic, watercolor and light sensitizer, potassium dichromate or ammonium dichromate and light source as sun or UV tube lights. Gum Arabic is mixed with watercolor pigment and a photosensitive substance called ammonium or potassium dichromate, and brushed onto … Continue reading