High contrast photographic recording material and emulsion and process for their development
申请人:EASTMAN KODAK COMPANY
(a New Jersey corporation)
公开号:EP0345025A1
公开(公告)日:1989-12-06
A photographic recording material and emulsion are described which are capable of providing high contrast images. The recording material and emulsion comprises negative working silver halide and contrast enhancing arylhydrazide nucleating agents of the formula.
wherein:
R is a substituted or unsubstituted alkyl having from 1 to 8 carbon atoms or a substituted or unsubstituted cycloalkyl having from 4 to 8 carbon atoms in the ring.