How to calcine gypsum? How to make croton paste?

Gypsum: remove miscellaneous stones, wash the soil and break it into small pieces. Gypsum calcination: take clean gypsum blocks, put them in a crucible, calcine them in the absence of fireworks until they are crisp, take them out, cool them and crush them. (1) Lei Gong's theory of baking: "When making gypsum, it must be pounded into powder with a stone mortar, which is called raw licorice water flying over, clarified, dried and studied." (2) "Outline": "Gypsum, in the ancient method, was only broken as big as a bean, wrapped in silk and boiled in soup. Because of its cold, burn it with fire, or fry it with sugar, you may wish to spleen and stomach. " ③ "medicinal meaning": "Gypsum, slightly calcined, raw and used, but too much calcined makes the body tired."

Croton paste: 1 traditional processing method

Throughout the evolutionary history, there is no great progress in the processing methods from Zhang Zhongjing's "Jade Letter in the Golden Chamber" to Taiping Huimin Hutchison's "peeling the heart membrane, pounding granules, wrapping paper to remove oil, and using frost as medicine". Take most raw croton seeds, grind them into paste, wrap them in water paper, and juice them.

The disadvantage of traditional processing methods is that the oil content of croton oil can only be observed by experience, and there is no scientific oil content determination method.

2. Processing method specified in China Pharmacopoeia.

(1) Take clean medicinal materials, grind them into mud, slightly heat them, and press off some oil to make loose powder that meets certain requirements; (2) After the nuts are crushed, the content of fat and oil is determined according to the content determination method to make it conform to the regulations, and a proper amount of starch is added and mixed for use.

3 new method of frost making

Take clean croton kernels, mash them, wrap them with multi-layer oil-absorbing paper, put them in an oven, take them out and put them on a micro-kang (pay attention to the temperature change and coking of oil paper), press off the grease, take out the re-research paper every two days 1 time, and measure the oil content to make the grease content meet the requirements (18%-20%).

Advantages: ① Inheriting the traditional preparation method of croton oil in China, combining with modern scientific methods for content determination; (2) After croton kernel is heated, the toxic globulin (croton toxin) in protein contained in croton kernel is solidified and inactivated, thus reducing irritation; (3) Contact dermatitis caused by contact with hulled croton during the processing of traditional Chinese medicine can be avoided.