Tanning Developer

// tanning developer patents and summary[ (G03C5/315)]

Patent Date Title
2059817 Sep 1934 Hardening Photographic Gelatin Emulsions and Solutions
4699868 Oct 1987 Photographic tanning developer formulation
US2566234A 1948 Photographic direct positive matrix process
3453109 July 1969 FORMING A RELIEF BY DEVELOPING AND HARDENING AN EXPOSED UNHARDENED SILVER HALIDE EMULSION
US4369245A 1980 Photographic element for tanning development and method for obtaining colored relief image
1946640 Feb 1934 METHOD OF MAKING WASH-OFF RELIEF – IMAGES