EP 0573700 A1 19931215 - Replenishment of a developer containing ascorbic acid and 3-pyrazolidone derivatives.
Title (en)
Replenishment of a developer containing ascorbic acid and 3-pyrazolidone derivatives.
Title (de)
Regenierung eines Ascorbinsäure- und 3-Pyrazolidinonderivate enthaltenden Entwicklers.
Title (fr)
Remplissage d'un révélateur comprenant de l'acide ascorbique et des dérivés de 3-pyrazolidinone.
Publication
Application
Priority
EP 92201656 A 19920609
Abstract (en)
A method is disclosed for processing with constant activity image-wise exposed silver halide photographic material comprising the steps of : (a) developing photographic material in a continuous automatic way by means of a developing solution containing an ascorbic acid analogue or derivative and a 3-pyrazolidone derivative as developing agents ; (b) replenishing said developing solution by means of at least one replenishing solution having a higher pH than the developing solution. In an alternative method the replenisher is added as a powder.
IPC 1-7
IPC 8 full level
G03C 5/31 (2006.01)
CPC (source: EP)
G03C 5/31 (2013.01)
Citation (search report)
- [Y] EP 0461783 A1 19911218 - KNAPP AUDENRIED W [US]
- [YD] US 4228234 A 19801014 - OKUTSU EIICHI, et al
- [YD] US 4081280 A 19780328 - CORLUY HANS JOSEPHUS, et al
- [Y] US 3826654 A 19740730 - WEISS G, et al
- [Y] T.H.JAMES (ED) 'The theory of the photographic process fourth edition' 1977 , MACMILLAN PUBLISHING CO.,INC , NEW YORK USA
- [A] JOURNAL OF IMAGING TECHNOLOGY vol. 10, no. 6, December 1984, SPRINGFIELD US pages 212 - 216 T N HENDRICKSON ET AL 'The critical role of sulfite in the re-use of photographic solutions'
Designated contracting state (EPC)
BE DE FR GB
DOCDB simple family (publication)
DOCDB simple family (application)
EP 92201656 A 19920609