The process of altering the shade of tanned animal hide to a deeper tone encompasses various techniques. Examples range from the application of specialized oils and dyes to the implementation of natural darkening agents and controlled exposure to environmental elements. The desired result is typically a richer, more intense color.
Achieving a deeper hue in leather can enhance its aesthetic appeal, provide a more uniform color across the material, or restore a weathered appearance. Historically, darkened leather has been favored for its durability, perceived ruggedness, and resistance to showing wear and tear. It also can provide an additional layer of protection against the elements.