A colour dye transfer photograph of a man looking at flowers, taken by an unknown photographer, c. 1930. The man wears blue and white checked dungarees.

A photograph of a man looking at flowers, taken by an unknown photographer, c. 1930.

The man wears blue and white checked dungarees.

The dye transfer process was introduced in the 1930s. Black and white colour separation negatives are used to expose matrix films which are dyed cyan, magenta and yellow. The final print is made by superimposing these dyed images in perfect registration.