The tannic acid of the Chinese food in today's market, its valence state and changing potential are of great importance to merchants and researchers. The tannic acid of food is widely used in the food industry, involving beverages and cakes, and is adjusted in both quality and taste.

Looking at its price, it is affected by various factors. The abundance of the source material is related to the production and origin of tannic acid. If the source of the material is wide and good, the price may be stable or reduced as the product increases; if the material is thin, the supply is difficult to meet the demand, and the price must rise.

The progress of the process also depends on the change of price. The best method improves efficiency and reduces consumption, reduces production costs, and the profit price is stable; the new technology is developed, and the quality increases and the work increases, and the price also increases.

The demand of the city is also the main reason. People's health and desire increase, and they seek high food quality and work, and the tannic acid of food needs to be longer, so the price will go up; if the competing products are out, they will be divided into market value, and the price will be reduced.

Overall, the price of tannic acid of food is dynamically changing under the factors of source materials, technology, and market demand. Businesspeople and researchers should observe the situation to adapt to the changes of the city and seek the prosperity of business.