👉 The keratinizing process refers to a type of skin condition where the outer layer of the skin, known as the stratum corneum (the protective outermost layer), becomes thickened and matted. This can result in a rough and uneven appearance on the surface of the skin, making it appear older or more aged. The keratinizing process is typically caused by an overproduction of melanin in the skin cells, which leads to the accumulation of dead skin cells and other debris.