Material selection criteria:
The eggshell is required to be clean, with white or pink frost outside the shell and no peculiar smell; Soda requires that the content of sodium carbonate should not be less than 90%; The content of calcium oxide in quicklime should not be less than 75%, and the content of sodium chloride in salt should not be less than 90%. Plant ash requires that the content of potassium carbonate and sodium carbonate should not be less than 75%, and the tea leaves should be in powder form.
Operation:
Accurately weigh all kinds of raw materials according to the formula standard and spread them separately. Then boil the tea for five to eight minutes, and melt the quicklime with the boiled tea water. After removing the ash, put it into soda ash and mix well. Finally, add salt and plant ash, and stir it into a paste, which can be used. When using, it should be used with it, so as not to reduce the efficacy. When operating, the operator should wear latex gloves, take a small lump of mud about 30 to 40 grams with a spoon and put it on the left hand valley or sawdust. Take an egg, gently turn the egg with both hands and roll it, so that the shell of the egg is evenly covered with 3 mm thick mud. Then leave it for about ten minutes, put it in a container, cover it and seal it. Under the condition of 20-25℃, it can mature in seven to eight days and can be stored for six months without deterioration.