In June 2020 at one of the tanneries technological trials were carried out to test recipes of dyeing-fatliquoring processes for white and beige belt crust using chemicals of the following companies: Shebekinskaya industrialnaya khimiya, LLC (Russia) and CROMOGENIA-UNITS.S. A. (Spain). Experimental batches of these articles received a positive assessment - the crust was compact, elastic, and the peripheral areas were sufficiently tied. The tannery purchased chemicals for processing a small production batch.