Radiation imagery chemistry: process – composition – or product th – Regenerating image processing composition – Developer
Patent
1996-08-28
1997-09-23
Le, Hoa Van
Radiation imagery chemistry: process, composition, or product th
Regenerating image processing composition
Developer
430398, G03C 5395
Patent
active
056703040
ABSTRACT:
A process for recycling a spent hydroquinone developer for black-and-white photographic processing which comprises the steps of determining the volume of developer, optionally filtering the developer, and reconstituting the developer, whereby the spent developer is brought back to substantially the same composition and/or level of performance as fresh developer wherein the recycled developer can be used to process black-and-white photographic materials without adverse effects.
REFERENCES:
patent: 3828172 (1974-08-01), Schickler
patent: 3970957 (1976-07-01), Passonage
patent: 4025344 (1977-05-01), Allen et al.
patent: 4081280 (1978-03-01), Corluy et al.
patent: 4228234 (1980-10-01), Okutsu et al.
patent: 4245034 (1981-01-01), Libicky et al.
patent: 4310622 (1982-01-01), Onda et al.
patent: 4311574 (1982-01-01), Ishikawa
patent: 4348475 (1982-09-01), Wernicke et al.
patent: 4464036 (1984-08-01), Taniguchi et al.
patent: 4527878 (1985-07-01), Taniguchi et al.
patent: 4719173 (1988-01-01), Hahm
patent: 4786584 (1988-11-01), Endo
patent: 4977067 (1990-12-01), Yoshikawa et al.
patent: 4988448 (1991-01-01), Woog
patent: 5057858 (1991-10-01), Woog
patent: 5160417 (1992-11-01), Neale
patent: 5212098 (1993-05-01), Hoffmann et al.
patent: 5344741 (1994-09-01), Iwata et al.
patent: 5466563 (1995-11-01), Ishikawa et al.
patent: 5565308 (1996-10-01), Carli et al.
Grant Haist: "Modern Photographic Processing, vol. 1", 1979, John Wiley and Sons, NY, US XP002016139, pp. 223-225, Maintenance of Developer Activity, p. 221.
British Kinematography Sound and Television Society Journal, vol. 66, No. 7, Jul. 1984, London, GB, pp. 320-324, XP002016137, Jeno Paizs: "How to Minimise Developer Comsumption", p. 322, Left-Hand col., line 5-26.
Journal of Imaging Technology for Imaging Science and Technology, vol. 10, No. 6, Dec. 1984, Springfield, US pp. 212-216, XP002016138, T. N. Hendrickson et al: "The Critical Role of Sulfite in the Reuse of Photographic Solutions", p. 213, Sulfite in Solution Recycle.
Database WPI, Section PQ, Week 8802, Derwent Publications Ltd., London, GB; Class P83, AN 88-009460, XP002016140 & JP-A-62 270 953 (Fuji Photo Film KK), 25 Nov. 1987, Abstract.
Lazaridis, Christina N., "Hydroquinone Oxidation in Lithographic Developers," Photographic Science and Engineering, 20, No. 1, 20-23, Jan./Feb. 1976.
Drew Products' Flyer, "RDF, A New Generation of Technology", 826 Kinderkamack Road, River Edge, NJ 07661.
Process Resource Management Pamphlet, "DEV-PAC", USI, 7707, 12022, 9602, 9203, Aug. 1991.
E. I. Du Pont de Nemours and Company
Le Hoa Van
LandOfFree
Recycling spent hydroquinone developer and a recycled hydroquino does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Recycling spent hydroquinone developer and a recycled hydroquino, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Recycling spent hydroquinone developer and a recycled hydroquino will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-1938221