3 Neutralizing

Wet-blueisacidanddevelopsacidityonstanding.Underacidconditionstheleatherproteiniscationicandthisisfurtheraccentuatedbythemineralretannage.Consequentlynegativelychargedcolloids,suchasvegetabletans,amino-resins,dystuffs,fatliquors,etc.willreadilyprecipitate ......      (共8540字)     [阅读本文]>>



更多同类【制革专业】......