What are the prevention and solutions of pulp dropping and color fading?

Prevention and solution of pulp dropping and color fading

Aiming at the accident that the ductility of resin does not match the ductility of leather itself, which leads to pulp cracking, pulp dropping and wet rubbing resistance:

Prevention: replace resin or add soft resin;

Solution: For leather goods with such accidents, the solution is to uncover the film-fatliquoring-coloring. Only in this way can the problems such as pulp cracking and pulp dropping be completely solved. Spraying crack repair agent or other soft resin can only solve this kind of problem temporarily, but it can't solve the problem fundamentally.

1. Sizing: To be exact, sizing does not belong to the category of fading. Cracking and slurry dropping of mortar belong to coating problems. Slurry cracking is coating cracking, and slurry dropping is coating peeling. If the shedding is not serious, it will often be mistaken for fading.

2. Dry and wet rubbing color: The fastness to dry and wet rubbing of leather goods is one of the items to test whether the leather goods are qualified after painting.

The so-called dry rubbing resistance: refers to the leather goods that have been thoroughly dried after painting. Wipe leather goods repeatedly with dry white cloth or white paper. If there is no color stain, it means that the dry rubbing fastness is very good and can pass the customs. If there is color pollution, it means that the dry rubbing fastness is not good and the quality is unqualified. The more serious the dry rubbing color is, the worse the dry rubbing fastness is.

The so-called wet rubbing resistance: refers to the leather goods that have been thoroughly dried after painting, and the leather goods are repeatedly wiped with wet white cloth or wet white paper. If there is no color stain, it means that the wet rubbing fastness is very good, on the contrary, it means that the wet rubbing fastness is not good or unqualified.