Sughrue, Mion, Zinn, Macpeak & Seas
Method for formation of an image comprising a heating step
 A novel method for formation of an image comprising a heating step, comprising the heating carried out in the presence of a compound of general formula (I): EQU X--SO.sub.2 (DI) (I) wherein X represents a reducing group capable of reducing a silver salt and capable of being oxidized by heating and in its oxidized state capable of releasing a compound represented by (DI)--SO.sub.2 NH.sub.2 by reaction with a nucleophilic agent; and (DI) represents a development inhibiting group capable of inhibiting the oxidation reduction reaction of the silver salt and a reducing aent. The compound of the formula (I) functions to inhibit development after a certain period of time from the beginning of heat development. The present method provides a stable image with reduced fog and image mottle. 
Fuji Photo Film Co., Ltd.
Y G G G Y
Y10S G03C G03C G03C Y10S
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Masatoshi Masashi Hiroshi Kozo Masaaki
Kato Takeuchi Kitaguchi Sato Tsukase