Stiffness of leather is structural problem.
The original fatliquor has diminished on those areas either due to heat that evaporates as gases, or leach out due to alkaline cleaners.
With the lost of fatliquor in between the leather fibers it becomes stick together, thus the stiffness.
Recommendation:
The leather thickness need to be hydrated to relax and separates the stick together fiber.
When the leather protein structure is plumps up with suppleness and ionic positive charged; fatliquor is replenished.
Fatliquor is ionic negative charged fat, oil and water.
The “fat” imparts fullness to the leather.
The “oil” lubricates the individual fibers (behaving just like well lubricated interlocking chain of hinges) that provide smoothness when the leather is compressed or stretched.
The “water” molecule that encases these fat and oil helps penetrates the leather structure; when hydrogen-bonded breaks free and leave breathing spaces for breathing comfort also known as transpiration.
If leather can be hydrated, it can be fatliquor replenishes to as soft as you wish.
Roger Koh
info@leatherdoctor.com
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