中药黑膏药的制备过程分为提取(油炸枯药料后去滓)、炼油、下丹、去火毒和摊涂五个步骤。現探讨炼油、下丹、去火毒这三个过程。一、炼油炼油的主要目的是使油由流质变为半流质。在物理性方面,粘度增高及比重增大是分別由于分子体积增大及分子量增加。在化学性方面,化学常数改变很大,首先是碘价与六溴价显著降低,表明飽和油脂增多,不飽 The preparation process of traditional Chinese medicine black plaster can be divided into five steps: extraction (after frying and drying of dried herbs), oil refining, Xidan, detoxification and booth coating. The three processes of oil refining, Xidan, and fire poisoning are now discussed. First, the main purpose of oil refinery is to make oil from liquid to semi-liquid. In terms of physical properties, the increase in viscosity and the increase in specific gravity are due to the increase in the molecular volume and the increase in the molecular weight, respectively. In terms of chemical properties, the chemical constants change greatly. First, the iodine value and hexabromovalent value are significantly reduced, indicating that saturated fats increase and are insufficient