Real leather is composed of microscopic fibers which are interlinked. When leather is used, it bends and the fibers bend and rub against each other. When it is alive and connected to the oil ducts of the animal, the fibers were all naturally lubricated. During tanning, the oils are first extracted, then later replaced with other oils (usually called "fat liquors"). Once the leather has been tanned, these oils eventually dissipate (faster in hot weather and exposed to the sun) in the leather. Once leather develops cracks, the cracks cannot be repaired, although further cracking can be prevented by applying oil or conditioners to the leather. Silicone can prevent oils from entering and lubricating leather, so it is only a quick fix for water-proofing. A natural oil is a preferable solution, although this will darken the leather. A general purpose leather lotion or even non-scented hand lotion (leather is skin) will replenish some fiber lubrication and some will not darken the leather, except temporarily.
The best leather is full grain leather. The reason it is best is because it is usually the strongest part of the leather. At the top of the skin, or epidermis level, fibers are tighter together and hence stronger. In order to be considered "full grain leather" the leather cannot be buffed or sanded on the top. Therefore, at the surface the leather fibers are most closely inter-linked, and strongest. When any of these fibers are buffed (sanded) in order to reduce the number of apparent blemishes, the leather's natural strength diminishes. Custom Coach uses the finest European full grain leather for most applications.
|