Abstract
AbstractThe problem of correlation between active impurities content of inert photographic gelatins and their effect on crystal growth and chemical sensitization is discussed.Good correlation has been found between the restraining properties as evaluated by some turbidimetric tests (Reindorp and AmmannBrass) and nucleic acid impurities and proteic sulphur compounds as detected by the Abribat test. Some tests give better correlations than others and a new modification of the Abribat test is proposed.It is shown that when the inert gelatins are tested with a direct positive emulsion there is a linear relationship with high correlation coefficient between speed and proteic sulphur content.
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