The company Shebekinskaya industrialnaya khimiya, LLC (Russia) continues work on improving the article "Crust-Nappa K". The trials were made on calf hides using the following fat liquors: "SMH-477", "SMH-480" and "SMH-6". The crust was evaluated satisfactorily; good fullness and uniform milling were noted. The heads of the tannery decided to work out the recipe on bovine hides. An order was made for the necessary materials for this article.