摘要 |
A novel hardening agent for photographic gelatin coatings comprising a composite solution of a substituted 1,3,5 triazine and formaldehyde, in which the ratio of triazine to formaldehyde ranges from 1:0.1 to 1:0.7. The hardening agent may be added to the gelatin coating in the amount of 0.5 to 4 weight % based upon the gelatin content.
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