Fatliquors that have experienced no chemical reaction or special treatment. Totally insoluble in water. Leathers with very good round feel, filling and fullness can be obtained. Excellent fibber lubrication, providing a better silky cut, especially in vegetal tanned leathers. Good light resistance. Greasy-soft feel.
Sulphited fatliquors are produced by reaction of fats with sodium bisulphite. In general they give smooth and very soft leathers but no filling effect. Provide hang hides with high inner softness. Excellent stability to tanning baths and electrolytes (acid and alkaline). can be used in all production stage, like tanning or retanning. Excellent penetration, distribution and fixation of fat. Can be used as single fatliquor. Specially TTK or CMT. Complete relaxation of the fibers cause excellent milling properties. Light fastness will depends on the type of fatliquor.