1. Crack surface: when leather is put in the room temperature or freezing, a few bending, wrestling, stretching or folding pressure will make the leather surface have cracking phenomenon.
2. Loose surface: refers to the phenomenon of coating and cortex mild separation, when 90 ° to the grain direction folding a larger grain surface wrinkles, also called loose face.
3. Slurry: coating layer is not sticky, or brittle which will be in powder or fast shape off.
4. Oil cream: As the lipid substances in the raw materials did not remove, in the process of placement, overheating or contact with the solvent, oil overflow and stay on the surface; in the summer the performance is sweating, and will cause white phenomenon in the cold winter.
5. Salt cream: refers to the salt in the leather that has not been fully washed clean, when the leather placed in a humid environment, salt exudation surface, resulting in a layer of gray frost on the grain surface, salt cream will be wiped away after the recurrence.
6. Rigidity: flat skin, hard board and poor permeability.
If you own a pure leather padfolio or leather journal, pls keep an eye on the above phenomenon and take care of your leather products.