Chrome soaps, when they come into contact with wet blue skins during the tanning process, can cause brown discoloration due to the chemical reaction between the chrome salts and the collagen in the leather. This brown staining is a common side effect in leather processing when chrome salts react improperly with moisture or other chemicals.
Step 1: Explanation of Staining
- Chrome soaps interact with the collagen fibers in the leather, causing them to change color, often resulting in a brown stain.
- Proper handling and controlled application of chrome salts during tanning are essential to avoid such discoloration.
Step 2: Conclusion
Thus, chrome soaps typically cause brown stains in wet blue skins.