Patent · US Expired

Offset printing plate

US4175965A · kind A · utility

6Cited by

0References

14Claims

0Family size

Assignee

MITSUBISHI PAPER MILLS LIMITED · JP

Inventors

Akio Yoshida · Tokyo, JP
Yasuo Tsubai · Nagaokakyo, JP
Seigo Ebato · Nagaokakyo, JP

Key dates

Filing date	Oct 27, 1977
Grant date	Nov 27, 1979
Priority date	—
Expiry date	Oct 27, 1997

Classification

Technology area (CPC G)Physics
CPC primaryG03F7/07
WIPO fieldOptics
WIPO sectorInstruments

Abstract

An improved direct offset printing plate high in photographic speed which utilizes silver complex diffusion transfer is obtained by using as a silver halide emulsion a direct positive silver halide emulsion which comprises silver halide grains which contain at least 80 mol % of bromide, the surface of said silver halide grains having thereon an electron acceptor and at least one sensitizing dyes selected from the group consisting of those having the following general formula (I): ##STR1## and those having the following general formula (II): ##STR2## (wherein Z, R.sub.1 -R.sub.3, M, A and p and q are as defined in the specification).

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