You can also use of m-xylene, ethanol and propylalcohol mixtrue for (generally in three different solvents with a 1: 1: 1 proportioner passbys).

• 也可用二甲苯、乙醇和异丙醇搀和溶剂来浓缩(凡是以不一栽溶剂各以1:1:1比例搀和较好)。