Patent · US Expired

Preparation for the processing of photographic materials

US3957516A · kind A · utility

2Cited by
5References
2Claims
0Family size

Assignee

Inventors

Key dates

Filing dateMay 10, 1974
Grant dateMay 18, 1976
Priority date—
Expiry dateMay 10, 1994

Classification

  • Technology area (CPC Y)Emerging Cross-Sectional Technologies
  • CPC primaryY10S430/15
  • WIPO fieldOptics
  • WIPO sectorInstruments

Abstract

The present invention relates to an oil-in-water emulsion which is suitable for processing photographic material. There is present or produced during the processing a substance which exerts its action on the photographic material from the aqueous phase. Contingent on the consumption the active substance is replenished or regenerated from the oily phase. The active substance is more readily soluble in the oily phase than in the aqueous one. The active substance may be, e.g., a dye bleach catalyst for silver dye bleach material or an alkylmercaptan, the latter acting as an antioxidant.

Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.