Specialists of Shebekinskaya industrialnaya khimiya, LLC have developed a new product "Evrosintan RSN-40" - a retanning agent based on acrylic polymer for different kinds of the leather in order to fill and obtain firm, elastic leather. In December 2020, the company Shebekinskaya industrialnaya khimiya, LLC (Russia) tested the recipe "Nappa K" using a new acrylate "Evrosintan RSN-40». The crust turned out to be filled and elastic, suitable for articles with and without milling. Finishing of this crust was carried out by the tannery independently; in the finished form the articles from this crust received a satisfactory assessment. At the moment the cost of production of these articles is being calculated in order to take further actions to continue the development of the Nappa K article.