1960s
gum bichromate, paper, 22.2 × 16.9 cm, mounted on cardboard 29.5 × 20.7 cm,
signed, titled and indication of colours on the reverse of the print, signed on the reverse of the cardboard
vintage

This work was made using the gum process, which is characteristic of the artist. The process involves reducing the solubility of gum arabic under the influence of light. A sheet of paper is coated with suspension of gum arabic with the addition of ammonium or potassium dichromate, or possibly ammonia. After drying, the paper is exposed by contact printing using slide or negative film. The print is then floated face down in a bath of room-temperature water; after several minutes the non-exposed gum and the pigment wash away, revealing the paper.