稀土在制革中的应用──Ⅲ.稀土助铬主鞣的难题及稀土与铬的用量

Application of Rare Earth Salt to Tannery──Ⅲ. The Studies about the Difficulties of Tanning with Rare Earth Salt Assisting Chrome and the Amount of Rare Earth Salt and Chrome

本文叙述了稀土助铬主鞣易产生色花、色花的实质及消除方法及稀土助铬鞣中，稀土与铬的最佳用量、用量比例和最佳的加入方式。

This paper describes the essence and removing methods of the color spot which is easy to meet when tanning with rare earth salt assisting chrome. It also discusses the optium amount of rare earth salt and chrome, the ratio of them and the optium adding method when tanning with rare earth salt assisting chrome