On alum and vinegar products
Alum and vinegar products have existed in ancient times. The method is exquisite, and the materials used are alum and vinegar. For alum, the texture is firm and brittle, and the color is white and pure; for vinegar, the taste is sour and mellow, and the nature is mild but not strong.

To make alum and vinegar products, it is necessary to abide by the procedures. First take an appropriate amount of alum, grind it into a fine powder, and the grains are uniform, like frost and snow. Then pour in the vinegar of the good wine slowly, and stir it while pouring, so that the alum powder and the vinegar liquid are perfectly mixed. The proportion is measured, and there is a fixed number. There should be no slight difference. If the difference is even a little, it will be a thousand miles.

and the two are compatible, put them in a clean vessel, or a kettle or an urn, and boil them slowly according to the The size of the fire is related to the success or failure of the product. If the fire is fierce, the liquid will easily boil and splash, losing its essence and alcohol; if the fire is small, it will take too long, and it will be difficult to make a good product. When cooking, you need to keep your eyes on it, watch its color change, and smell its smell. When the color is yellowish, the smell is mellow and there is no pungent acid, the heat is appropriate.

Alum vinegar products made of are widely used. For doctors, it can be used as medicine to treat all kinds of sores, swelling and poison. Apply to the affected area, cool and relieve pain, can eliminate redness and swelling, remove rot and build muscles, and help the skin heal. It is also wonderfully useful in cooking. It can be added to the food to taste, increase the flavor of the dish, and make the eater's lips and teeth fragrant and appetite open. Or it can be used for the preservation of fruits and vegetables, so that they will last for a long time without damage, and the color will be the same as before.

However, if you want to get a good product, it will not happen overnight. Craftsmen need to be in awe, study their skills, and pass them on from generation to generation, so that the wonders of alum and vinegar products can last forever and benefit everyone.