What are the main factors affecting vegetable planting?

Q: What are the main factors affecting vegetable tannins?

 

A: Although there are many factors affecting vegetable tannins, they all affect the tanning process and the effect of tanning by affecting the two indicators of penetration and combination. These factors include:

 

1. The state of the naked skin: mainly refers to the looseness of the naked skin collagen fibers and the pretreatment state before the sputum.

 

2, the performance of plant tincture: mainly refers to the penetration ability of the tincture into the skin, the ability to bind to the skin, can give the excellent performance of the leather, as well as the color, solubility, pH, precipitation of the tincture itself.

 

3. Concentration and newness of sputum: When the concentration of sputum is low, the concentration gradient of sputum diffusion into the skin is small, and the penetration is slow; when the concentration of sputum is high, the concentration gradient of sputum diffusion into the skin is large, and the penetration is fast. However, the aggregation degree of the enamel particles is increased, the osmotic pressure difference between the inside and outside of the skin is also increased, and the dehydration effect on the skin is also enhanced.

 

4, the temperature of the sputum: increase the temperature, can accelerate the penetration rate of enamel to the skin, while increasing the irreversible binding amount and total binding amount of enamel and collagen, increasing the hardness of the leather.

 

5, the pH value of the sputum: directly affects the size and charge of the enamel particles, the charging condition of the bare skin, and affect the rate of penetration of enamel into the skin and the combination with the skin.

 

6. Neutral salt: After the naked skin is treated with neutral salt before tanning, the combination of enamel and collagen can be slowed down at the beginning of the sputum, avoiding the grain surface roughness or surface sputum, which is conducive to the penetration of enamel; The more neutral salt will hinder the combination of vegetable and collagen, and it can also cause some enamel to precipitate and lose due to salting out, and also reduce the purity of sputum.

 

7, mechanical action and control time.