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AssigneeFuji Photo Film Co., Ltd.
InventorsHiroyuki Mifune, Nobuaki Miyasaka, Yoshiharu Fuseya
Estimating the term…
A silver halide photographic emulsion containing the compound represented by the formula (I): R.sub.1 --(X--R.sub.3).sub.m --X--R.sub.2 (I) wherein R.sub.1 and R.sub.2 each represents an alkyl group containing 1 to 5 carbon atoms substituted with two or more substituents selected from --OH, --NHR.sub.4, --COOR.sub.4, --CONH.sub.2, --SO.sub.3 H, --COOM, or --SO.sub.3 M, R.sub.3 represents an alkylene group containing 1 to 4 carbon atoms which may be substituted by --OH, R.sub.4 represents a hydrogen atom or an alkyl group containing 1 to 5 carbon atoms, X represents a sulfur or oxygen atom, provided at least one X is a sulfur atom, m represents 0 or an integer of 1 to 4, and M represents an alkali metal atom.
A silver halide photographic emulsion containing about 0.001 to 1 gram per mol of silver halide of the compound represented by the formula:
In a process for preparing a silver halide emulsion, the improvement which comprises adding about 0.001 to 1 gram per mol of silver halide of a compound of the formula:
Dependencies are inferred from the claim text.