Minnesota Mining and Manufacturing Company

R Dean Lowrey

Bruce W Wittnebel

William A Huffman

Geoffrey C Nicholson

An inhibitor removing bath for effecting color formation in a color positive development process which bath comprises a color accelerating agent, a contrast control agent and a pH control agent. The inhibitor removing bath may further contain in a preferred embodiment a color reversal agent. A complete color photographic development process using this inhibitor removing bath is found to provide color positive transparencies of excellent quality.

Inhibitor removing bath for direct positive color photographic

The addition of either a borohydride or borane complex anhydrously associated with an aldose to an inhibitor removing bath which does not contain a color reverse agent improves color balance and contributes color agent to the bath. Addition of these anhydrously associated materials avoids possible decomposition in premixed solutions.

Growing community of inventors

Saint Paul, MN, United States of America

R Dean Lowrey