Method of forming a photographic image

Details Method of forming a photographic image Method of forming a photographic image

1976-07-23

1977-08-30

Kelley, Mary F.

Gas separation: apparatus

Electric field separation apparatus

Including gas flow distribution means

96 22, G03C 532

Patent

active

040452255

ABSTRACT:
A method of forming an image which comprises subjecting a photographic element comprising a support and at least one photographic layer in which there is image-wise distributed a substance having a catalytic effect to image-wise intensification in the presence of a reducing agent using a solution containing: (1) at least one of hydrogen peroxide and compounds capable of releasing hydrogen peroxide or a halogenite, and (2) at least one nitro-substituted nitrogen-containing heterocyclic compound represented by the following General Formulae (I) and (II); ##STR1## in which R.sub.1 represents hydrogen atom, an alkyl group, SO.sub.3 M or COOM, wherein M represents a hydrogen atom, an alkali metal or ammonium group, X represents nitrogen atom or CR', wherein R' represents a hydrogen atom or a lower alkyl group, and ##STR2## in which R.sub.2 represents hydrogen atom, an alkyl group, SO.sub.3 M or COOM, wherein M represents a hydrogen atom, an alkali metal or an ammonium group and Y represents a hydrogen atom, an alkyl group or CH.sub.2 --S--(CH.sub.2).sub.n --Y' wherein n represents 1 to 3 and Y' represents a hydrogen atom or SO.sub.3 M.

REFERENCES:
patent: 3765891 (1973-10-01), Travis
patent: 3820997 (1974-06-01), Shirasu et al.
patent: 3841873 (1974-10-01), Mowrey
patent: 3846130 (1974-11-01), Purol

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