Process for the formation of a high contrast negative image

Details Process for the formation of a high contrast negative image Process for the formation of a high contrast negative image

1987-03-13

1989-05-23

Michl, Paul R.

Radiation imagery chemistry: process, composition, or product th

Silver halide colloid tanning process, composition, or product

Process using lithographic infectious developer

430438, 430439, 430437, 430445, G03C 106, G03C 524

Patent

active

048330647

ABSTRACT:
A novel process for the formation of a high contrast negative image is provided which comprises processing a silver halide photographic material with a developing solution, wherein said developing solution contains a dihydroxybenzene developing agent, a 1-phenyl-3-pyrazolidone auxiliary developing agent and/or p-aminophenol auxiliary developing agent, 0.3 mol/liter or more of sulfite, and a compound represented by formula (I) ##STR1## wherein Y and Z, which may be the same or different, each represents N or CR.sup.2 wherein R.sup.2 represents a substituted or unsubstituted alkyl or aryl group; R.sup.1 represents an alkyl, aryl or heterocyclic group which is substituted by at least one group selected from the group consisting of --SO.sub.3 M, --COOM, --OH, --NHSO.sub.2 R.sup.3, --SO.sub.2 NR.sup.3 R.sup.4 and --NR.sup.5 CONR.sup.3 R.sup.4 or a group formed by alkyl groups, aryl groups or heterocyclic groups via linkage groups; R.sup.3, R.sup.4 and R.sup.5, which may be the same or different, each represents a hydrogen atom or a lower alkyl group containing from 1 to 4 carbon atoms; and M represents a hydrogen atom, an alkali metal atom, quaternary ammonium, or quaternary phosphonium.

REFERENCES:
patent: 4328302 (1982-05-01), Nishimura et al.
patent: 4444875 (1984-04-01), Nagashima et al.
patent: 4452882 (1984-06-01), Akimura et al.
patent: 4668605 (1987-05-01), Okutsu et al.
patent: 4681836 (1987-07-01), Inoue et al.

Affiliated with

Also associated with

Rating

Process for the formation of a high contrast negative image does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Process for the formation of a high contrast negative image, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Process for the formation of a high contrast negative image will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-1730523