Method for restraining the formation of re-reversal negative image in direct positive silver halide photographic materials

A restraining method for restraining the formation of a re-reversal negative image comprising incorporating a cyanine dye or a merocyanine dye which is electron donative and adsorbable on silver halide in at least one hydrophilic colloid layer of an internal latent image type direct positive silver halide photographic material as a re-reversal restrainer,

• wherein said direct silver halide photographic material contains at least one internal latent image type direct positive silver halide photographic emulsion layer providing a maximum sensitivity of the high illuminance re-reversal negative image of the silver halide emulsion layer of higher than 30 wherein the sensitivity is as defined below:
• Coating Conditions:
• a black and white internal latent image type direct positive photographic material containing no said restrainer is prepared by uniformly coating the silver halide emulsion on one surface of a transparent support at a silver coverage of 5.0 g/m.sup.2, and the nucleating agent having the structural formula:
• ##STR20## is added to the silver halide emulsion in an amount such as the maximum density of the direct positive image obtained after development is higher than 1.0;
• Exposure Condition:
• the silver halide emulsion layer side of the photographic material is exposed for 1/10,000 seconds by white light of a color temperature of 4,800.degree. K. using a xenon lamp as a light source;
• Processing Condition:
• after developing using a surface developer composed of 0.06 wt% 1-phenyl-3-pyrazolidone, 1 wt% of hydroquinone, 3 wt% sodium sulfite, 4 wt% sodium tertiary phosphate, and 1.1 wt% sodium hydroxide at 20.degree. C. for 10 minutes, fixing and washing are performed;
• Negative Sensitivity Indication:
• shown by 100 times the reciprocal of the exposure amount (cd. m. s.) at the density point of (maximum density+minimum density).times.1/2 of the negative image.