Abstract: Three theory problems about technology of leather making are discussed.The first is the difference between sur文摘:本文讨论了皮革制造中的三个理论问题，一是表面电荷与电点(PI)之间差别，二是三价铬鞣液配制中公式的简单来源，三是生皮在碱液中膨胀的机理。