The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Oct. 12, 1982
Filed:
Sep. 05, 1980
Applicant:
Inventors:
Assignee:
Mitsubishi Paper Mills, Ltd., Tokyo, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
G03C / ;
U.S. Cl.
CPC ...
430536 ; 430538 ; 430605 ; 430608 ; 162 78 ; 162 80 ; 1621 / ; 162182 ;
Abstract
A silver halides photographic material with improved keeping quality, said material having a substrate formed by coating a base web with a film-forming resin, preferably a polyolefin resin, said base web being composed principally of natural pulp or a mixture of two or more different types of natural pulp having a post color number of 2 or below, said post color number being defined by the following formula: ##EQU1## [wherein Ro is brightness (%).times.(1)/(100) before fading treatment, R is brightness (%).times.(1)/(100) after 18-hour fading treatment at 85.degree. C. and 95% RH, and P is post color (PC) number which indicates the degree (nondimensional number) of fading].