Title:
PHOTO-CHROMIC FILM COMPONENTS
Document Type and Number:
Japanese Patent JPS51120213
Kind Code:
A
Abstract:
PURPOSE: To gain photo-chromic film components mainly consisting of 1', 3', 3' - trimetyl indolino nitro-benzo spiro pyrane which minimize a fogging phenomenon and extremely lengthens the life of color.
Inventors:
OOISHI HIDEO
WAKAMATSU JIROU
WAKAMATSU JIROU
Application Number:
JP4477175A
Publication Date:
October 21, 1976
Filing Date:
April 15, 1975
Export Citation:
Assignee:
FUJIKURA KASEI KK
International Classes:
C09K9/02; G03C1/685; (IPC1-7): C09K9/02; G03C1/733