Diffusion transfer photographic materials
Abstract
Abstract A TONING AGENT REPRESENTED BY THE GENERAL FORMULA 2-(X-CH2-),3-(S=),4-R,5-R''-2,3-DIHYDRO-4H-TRIAZOLE 2-((3-(S=),4-R,5-R1-2,3-DIHYDRO-4H-TRIAZOL-2-YL)-CH2- Y-CH2-),3-(S=),4-R,5-R''-2,3-DIHYDRO-4H-TRIAZOLE WHEREIN R AND R1 EACH REPRESENTS A HYDROGEN ATOM, A LOWER ALKYL GROUP OR AN ARYL GROUP; X REPRESENTS A HYDROXYL GROUP AND -N(-R1)-R2 (WHERE R1 AND R2 EACH REPRESENTS A LOWER ALKYL GROUP OR ARYL GROUP AND R1 AND R2 MAY TOGETHER COMPLETE A HETEROCYCLIC RING); AND Y REPRESENTS -N(-R3)- (WHERE R3 REPRESENTS A LOWER ALKYL GROUP OR AN ARALKYL GROUP), IS USED IN DIFFUSION TRANSFER PHOTOGRAPHIC MATERIAL TO GIVE DEEP BLACK IMAGES OR PRINTINGS ON A POSITIVE MATERIAL IN DIFFISION TRANSFER PHOTOGRAPHY.
Inventors
- 👤 Fumihiko Nishio
- 👤 Reiichi Ohi
- 👤 Tatsuyo Tajima
Bibliographic Details
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