The method of making things
There are various techniques of making things in the world, among which potassium alum, sodium chloride, and acetic acid can be widely used.

Potassium alum is dry and astringent. It can also be used in the preparation of things to make the substance coagulate and solidify. For example, in the matter of dyeing and weaving, potassium alum can be used to make the color firm and not easy to fade, and the color of the fabric is long and fresh.

Sodium chloride has a salty taste and is commonly used in the world. In cooking, it can be seasoned to make the taste of food mellow; in making things, it is also very useful. With brine, it can make the quality of things firm and prevent the disease of decay. Sodium chloride is very powerful in pickling various things, such as preserved meat, vegetables, and vegetables. It can keep its taste and not be damaged for a long time.

Acetic acid, sour and strong in nature. In the preparation of things, it can turn hard into soft, and it can remove filth and keep it clean. Tanning with acetic acid, leather can be soft and tough, and it can remove its fishy smell. It can also be used to clean utensils, and the dirt can be dissipated in case of filth.

If it is used in combination with potassium alum, sodium chloride, and acetic acid, it is even more unexpected. For example, in pottery, potassium alum makes clay coagulate, sodium chloride helps it resist fire, and acetic acid clears its impurities. The three are combined, and the made pottery is strong and beautiful, and can be a treasure. Another example is pharmaceuticals, where the three or adjust their properties, or help their effects, so that the power of the medicine is more obvious.

Therefore, those who want to make good products should carefully observe the properties of potassium alum, sodium chloride, and acetic acid, evaluate the situation, and use them appropriately, in order to make exquisite products for the world to use.