Sulphated fatliquor for soft and tight-grained leather Sulphated fatliquor for soft and tight-grained leather. Suitable applications of this leather chemical include bag leather, shoe upper and suede. Characteristics Synthol SF 838 is a sulphated fatliquor with deep and uniform penetrating properties, thus ensuring both softness and grain tightness. Synthol SF 838 gives the leather a warm smooth handle, most notable on the flesh side. Dyeings are not bleached and maintain their brilliance when Synthol SF 838 is used. Synthol SF 838 gives nubuck and suede leathers a uniform nap and fine lustre. TDS request Request a TDS of product TDS Sample request Request a sample of product Request