The characteristics of tanning production in leather industry in China are mostly wet processing, that is, in water. Many leather chemical raw materials have to be added into water, which is a kind of high-concentration organic water, containing a lot of lime, dyes, protein, salts, oils and fats, ammonia nitrogen, sulfides, chromium salts and other substances. Improper handling will release gases such as ammonia, nitrogen and sulfur. Staying in such a high concentration gas environment for a long time is definitely harmful to your health. It is recommended to keep good ventilation in the store. Also, you can put leather products in a closed counter, so that the smell is not easy to escape.