Photographic products and processes

Details Photographic products and processes Photographic products and processes

1993-03-31

2000-08-15

Trinh, Ba K.

Organic compounds -- part of the class 532-570 series

Organic compounds

Heterocyclic carbon compounds containing a hetero ring...

549 53, 549265, C07D33364, C07D30783, C07D30797

Patent

active

061039128

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.

REFERENCES:
patent: 3000833 (1961-09-01), Coleman et al.
patent: 3415644 (1968-12-01), Land
patent: 3415645 (1968-12-01), Land
patent: 3415646 (1968-12-01), Land
patent: 3702244 (1972-11-01), Bloom et al.
patent: 3702245 (1972-11-01), Simon et al.
patent: 4615966 (1986-10-01), Borror et al.
patent: 4886733 (1989-12-01), Simon
patent: 4891298 (1990-01-01), Waller
D.A. Brown and M.J.S. Dewar, J. Chemical Soc., 1954, pp. 2134-2136.
Chemical Abstract No. 89:148,275b, S.M. Kazakova et al., "Composition for Heat-Sensitive Coating", p. 76, 1978.

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