Synthetic fatliquor for upper leather and splits The leather chemical Synthol NE is a synthetic fatliquor for upper leather and splits. Suitable applications include shoe upper. Shoe Upper When Synthol NE is used as a single fatliquor the resulting leathers have a well balanced handle. The leathers are characterized by medium softness, good roundness and very good grain tightness. TDS request Request a TDS of product TDS Sample request Request a sample of product Request