Method of image formation

A method of image information using a silver halide photographic photosensitive material comprising a support having provided on the frontside thereof a plurality of hydrophilic colloid layers, at least two layers of which are silver halide emulsion layers, at least one of said hydrophilic colloid layers contains a hydrazine compound, said photosensitive material further containing at least one compound represented by formulae (II) and (III):

• Y--((X).sub.n --A--B].sub.n (II)
• wherein Y represents a group which is adsorbed on silver halide;
• X represents a divalent linking group comprising an atom or group of atoms including hydrogen, carbon, nitrogen oxygen and sulfur atoms;
• A represents a divalent linking group;
• B represents an amino group, an ammonium group, or a nitrogen-containing heterocyclic group, and the amino group may be a substituted amino group;
• m represents 1, 2 or 3;
• and n represents 0 or 1;
• ##STR24## wherein R.sup.31 and R.sup.32 each represents a hydrogen atoms or an aliphatic group, or R.sup.31 and R.sup.32 may combine and form a ring;
• R.sup.33 represents a divalent aliphatic group;
• X represents a divalent nitrogen-, oxygen- or sulfur-containing heterocyclic group;
• n represents 0 or 1;
• and M represents a hydrogen atom, an alkali metal, an alkaline earth metal, a quaternary ammonium salt, a quaternary phosphonium salt, or an amidino group, the photographic speed of the emulsion layer on the side furthest from the support of said at least two silver halide emulsion layers is higher by 0.1 to 0.4 logE than the photographic speed of the emulsion layer which is closest to the support, comprising the steps of imagewise exposing through the backside of said support and developing said imagewise exposed photosensitive material, whereby a high contrast negative image having a gamma of at least 8 is obtained.