Patent · US Expired

Silver halide photographic material comprising spacing particles

US5753425A · kind A · utility

2Cited by

5References

6Claims

0Family size

Assignee

Agfa-Gevaert NV · BE

Inventors

Hubert Vandenabeele · Mortsel, BE
Daniel M. Timmerman · Mortsel, BE
Ronny De Clercq · Aalter, BE

Key dates

Filing date	Jan 29, 1996
Grant date	May 19, 1998
Priority date	—
Expiry date	Jan 29, 2016

Classification

Technology area (CPC Y)Emerging Cross-Sectional Technologies
CPC primaryY10S430/162
WIPO fieldMacromolecular chemistry, polymers
WIPO sectorChemistry

Abstract

A silver halide photographic material is provided comprising at least one silver halide emulsion layer and an outermost layer comprising an hydrophillic binder and polymeric spacing particles characterized in that (i) the outermost layer has a thickness between 0.3 to 0.9 pm and (ii) the polymeric spacing particles comprise at the surface alkali metal carboxylate or sulphonate groups equivalent to an acid value greater than 1.0 mg KOH per 1 g of polymeric spacing particles. In a preferred embodiment the said spacing particles have a volume average diameter (d.sub.v50) that is 5 to 30 times larger than the thickness of the outermost layer.

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