Naphthalide indicator dyes

Details Naphthalide indicator dyes Naphthalide indicator dyes

1976-03-22

1977-11-01

Torrence, Dolph H.

Chemistry of carbon compounds

Miscellaneous organic carbon compounds

C-metal

96 3, 96 29R, 96 29D, 26032612R, C07D20918

Patent

active

040565394

ABSTRACT:
This invention relates to indole (na) phthalide indicator dyes substituted with a particular class of hydrogen bonding groups, such as, perhaloalkyl carbinols. These dyes are useful as optical filter agents in photographic processes to protect a selectivity exposed photosensitive material from further exposure during processing in the presence of incident light.

REFERENCES:
patent: 3816124 (1974-06-01), Karger et al.
patent: 3816453 (1974-06-01), Karger et al.
patent: 3941807 (1976-03-01), Borror

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