| 摘要 |
<p>Specific organic halogen compounds, namely 2,2,2-trichloroethanol, m-nitrobenzyl chloride, 3-chloroaniline, 2-chioro-4-nitrobenzyl chloride, o-chloranil, p-nitrobenzyl chloride, chlorohydroquinone, 4-chloro-2-nitrobenzyl chloride, 4-chloro-3-nitrobenzyl chloride, o-nitrobenzyl chloride, alpha , alpha , alpha ,-trichlorotoluene, 4,6-dichloro-5-nitropyrimidine, 5-chloro-2(trichloromethyl)benzimidazole, 2-chloro-3-nitropyridine and 2-amino-3,5-dichloropyridine, when incorporated in a negative-working silver halide emulsion, in an after-digestion or in-line injection step, give significantly reduced fog levels accompanied by little or no speed loss.</p> |
