For many years the leading fixatives were the animal products ambergris, civet , musk and castoreum.

年来，用的较的固定剂是动物制品龙涎、猫、麝、河狸。

Methods The eyeballs of rat were fixed in the improved fixative solution mixed with paraform,glacial acetic acid and acetone.

方法将鼠眼球投入到甲醛、冰醋酸和丙酮组成的改良固定液中固定后制成石蜡切片,经HE染色后在显微镜下观察。