Dry stabilization of a silver halide photographic material

A dry method for the stabilization of a print-out silver halide photographic material wherein the silver halide is the image-forming substance, which comprises (1) imagewise exposure of a silver halide photographic emulsion material to form a print-out image, wherein said silver halide photographic emulsion material consists essentially of silver halide grains at least 50 mol% of which consists of silver bromide and 0.1 to 33 mol%, based on the silver halide, of an onium compound having an iodine ion or an anion containing iodine, said onium compound being a member selected from the group consisting of compounds of the formulae ##EQU3## and

• [R.sub.8 -- I-- R.sub.9 ] .sup.+ X.sup.-
• wherein A is N, P, As or Sb, B is O, S, SO, Se or Sn, and each of R.sub.1 to R.sub.9 is an alkyl group having less than 8 carbon atoms, or an aryl group having less than 16 carbon atoms, or of said R.sub.1 to R.sub.9 two groups can be connected to each other to form a ring selected from the group consisting of a pyridine ring, a morpholine ring, an oxazine ring, a thiazine ring, a thiazole ring, an oxazole ring, a benzothiazole ring and a benzo-oxazole ring, and wherein X is an iodine ion or an iodine containing anion;
• and subsequently (2) heating said photographic material to a temperature of at least 80.degree.C, thereby stabilizing said print-out image.