Abstract
For studying oil tanning process, a method in which tanning effect of oil tanned hide was evaluated by solubilized nitrogen quantity as a indicator, was examined. Raw hide powder was completely solubilized when it was left standing in a acid solution containing 0.2 N of sulfuric acid and 0.1M of sodium acetate at 45°C for 48 hours, while oil tanned hide powder was solubilized only to a extent reduced with increased degree of tanning. Using this measure, effects of some factors involved in oil tanning process were examined precisely. The results indicated a significant efficiency for studying reaction mechanism in oil tanning. In addition, they indicated that it was very important to make clear the role of moisture in oil tanning reaction.
