Radiation imagery chemistry: process – composition – or product th – Transfer procedure between image and image layer – image... – Diffusion transfer process – element – or identified image...
Patent
1991-08-20
1993-09-14
Schilling, Richard L.
Radiation imagery chemistry: process, composition, or product th
Transfer procedure between image and image layer, image...
Diffusion transfer process, element, or identified image...
430236, 430227, 430244, 430517, 430449, 430486, G03C 184, G03C 554
Patent
active
052447715
ABSTRACT:
A novel class of bridged indicator dyes is disclosed which possess absorption in the infrared region of the electromagnetic spectrum. These bridged indicator dyes are useful as light-absorbing, pH-sensitive optical filter agents in diffusion transfer photographic processes adapted to be performed in the presence of ambient light and to diffusion transfer products useful in such processes. These indicator dyes will also find utility in titrations and other analytical techniques and products where pH-sensitive indicator dyes are employed and absorption of infrared is useful.
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Jandrue, Sr. Charles E.
Kampe Marcis M.
Simon Myron S.
Waller David P.
Whritenour David C.
Loeschorn Carol A.
Polaroid Corporation
Schilling Richard L.
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