LIGHT-SENSITIVE SILVER HALIDE PHOTOGRAPHIC EMULSIONS

摘要

An ethylene oxide addition polymer of an alkylphenol- formaldehyde condensate, said polymer consisting of the recurrent structural unit of the formula WHEREIN R1 is an alkyl group; R2 is an alkyl group or a hydrogen atom; and n is an integer of 1 to 100, and having an average polymerization degree in the range of 2 to 10, has been found effective as a sensitizer for a light-sensitive silver halide photographic emulsion, without causing any adverse effect on photographic properties.