Photographic light-sensitive and heat developable material

Claim 1

A light-sensitive photographic material free of light-sensitive heavy metal salts containing a light-insensitive silver salt selected from the group consisting of silver salt of a long-chain fatty acid, and a silver salt of aliphatic carboxylic acid containing a thioether group; and the material contains a polymethine sensitizer in a spectrally sensitizing amount selected from those having the following formulae: ##SPC12## in which R 1 , r 2 = (1) a saturated or unsaturated aliphatic group; (2) cycloalkyl; (3) aryl or (4) alkoxy; R 3 = hydrogen, phenol or a saturated aliphatic group; R 4 = hydrogen, cyano, --CO--R 8 , ##EQU7## --COOR 8 ; R 5 = R 8 , OR 8 , ##EQU8## R 4 + R 5 together the ring members required for completing an isocyclic or heterocyclic ketomethylene ring; R 6 , r 7 = hydrogen or R 8 ; R 8 = a saturated or olefinically unsaturated aliphatic group; X(-) = an anion other than an anion capable of producing a light-sensitive silver metal salt with the non-light sensitive silver salt in the material; m = 4, 5, 6; n = 0, 1, 2; r, p, q= 0, 1: Q = o, s; r 9 = hydrogen, R 8 or aryl; Z 1 , z 2 = the members required for completing a 5- or 6-membered heterocyclic ring in which the heterocylcic group may contain a condensed benzene or naphthalene ring; Z 3 = the ring members required for completing an isocyclic or heterocyclic ketomethylene ring; Z 4 = the members required for completing a 5- or 6-membered isocyclic ring; Z 5 = s, n--r 9 ; y = a radical of the following formulae: ##SPC13## in a proportion of 0.1 - 2 g of sensitizing dye per mol of the silver salt for spectrally sensitizing the silver salt solely by said sensitizer, whereby the combination of the silver salt and said sensitizer is light-sensitive only in the spectral range of said sensitizer; and a reducing agent having at least one active hydrogen atom attached to O, N or C, capable of reducing the silver salt in areas exposed to light and causes the development of a visible image in said material by reducing the silver salt when processed with heat after exposure whereby the said combination is sensitive to light in the absence of light-sensitive heavy metal salts.