104. Miss Acland's three-colour separation negative of 'Spanish Gipsies' in Gibraltar, c. 1900
The basic stage in three-colour photography is the production of three black and white negatives taken through filters of the three primary colours; these can then be printed in their complimentary pigments to form paper prints or (more usually) film and glass transparencies. Separation negatives on a single glass plate such as this were taken in a special repeating plate holder.
Glass strip 22 x 84 mm with three b/w negatives.