Applied Damp Bandages Were Without An Oil-cloth Layer,

Applied damp bandages were without an oil-cloth layer, and it conducted to fast drying the operating(working) beginning, and red demands long time. For elimination of these reasons new means were necessary and we send(have passed) to chromic . Chromic salts communicate not only with an amino group, but also with group COOH. Duration at this way much smaller, than at red . In chromic the basic salt multinuclear is absorbed at means of a strong acid, its(her) a part molecule by an amino group of a fabric then it is fixed in a complex at means NH2 and COOH. Tanning action is inherent in salts of chrome capable to to splitting and, hence, forming solutions with sour reaction. Already initial supervision at insignificant grazes have shown, that it is necessary to apply strongly diluted solutions, differently it turns out dry a superficial layer. We prepared for an initial solution of chrome, proceeding from usual in tanning manufacture : 70,0 dissolve in 120 ml. The distilled water. Cautiously add to this solution 90,0 sulfuric acids/66 [?]/.