Colored photosensitive composition

A method of providing a substantially uniform colored photosensitive composition useful in the reprographic art, which comprises:

• a. Reacting a water soluble basic dye with a water soluble organic acid or the ammonium or alkali metal salt thereof, in an aqueous medium to precipitate a dye substance which is substantially insoluble in water, substantially soluble in organic solvents and substantially non-reactive with diazo photosensitizers;
• b. Separating said precipitated dye substance from its aqueous environment;
• and
• c. Substantially uniformally dissolving said separated dye substance and a diazo photosensitive composition useful in the reprographic arts in a suitable organic solvent composition said diazo photosensitive composition being a reaction product of a paradiazo diphenylamine-paraformaldehyde condensate with a coupling agent selected from the group consisting of naphthol sulfonic acids and salts thereof, sulfoanthranilic acid, N-lower alkyl-5- sulfoanthranilic acids, sodium 2,2'-dihydroxy-4,4'-dimethoxy-5-sulfobenzophenone, and 2-hydroxy-4-methoxy-benzophenone-5-sulfonic acid and a trihydrate thereof;
• and
• d. Removing said solvent composition.