Photographic developer compositions for obtaining high contrast

Details Photographic developer compositions for obtaining high contrast Photographic developer compositions for obtaining high contrast

1973-12-21

1976-10-05

Kelley, Mary F.

Gas separation: apparatus

Electric field separation apparatus

Including gas flow distribution means

G03C 530

Patent

active

039842436

ABSTRACT:
A photographic developer composition for obtaining high contrast images which comprises (1) a dihydroxybenzene developing agent, (2) an alkanolamine and (3) a compound having the following formula (I) ##SPC1##
wherein R.sub.1 and R.sub.2 each represents a lower aliphatic hydrocarbon group, wherein R.sub.1 and R.sub.2 may combine to form a ring, n represents 0 or 1, and X.sup..crclbar. represents an anion.

REFERENCES:
patent: 3615488 (1971-10-01), Drago et al.
patent: 3615524 (1971-10-01), Milton
patent: 3708303 (1973-01-01), Salesin
patent: 3713827 (1973-01-01), Willems
patent: 3749574 (1973-07-01), Pollet et al.
patent: 3847618 (1974-11-01), Hofman et al.
T896,022, Mar. 1972, Williams et al., 96/66.3.

Affiliated with

Also associated with

Rating

Photographic developer compositions for obtaining high contrast does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Photographic developer compositions for obtaining high contrast , we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Photographic developer compositions for obtaining high contrast will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-652977