In December 2021, the specialists of Shebekinskaya industrialnaya khimiya, LLC (Russia) tested recipes of wet-blue production with the weight of raw hides - buffalo: 19-22 kg and 25-30 kg. The recipe used chemicals of Shebekinskaya industrialnaya khimiya, LLC (Russia) and chemicals of the company Cromogenia-Units S.A. (Spain): "SN-22S", "SN-OV", "Fermentol-23", "Vega E-93", "Vega RLT", "Tripsol RSTP", "Basificante MG". When summing up the results of the work carried out, the following were noted: uniform colour of wet-blue, smoothed wrinkles, the presence of weakly expressed belly wrinkles, as in similar tannery batches. In general, the work was evaluated satisfactorily, the final evaluation of the work will be done after making crust. Plans for further work to improve the wet-blue are outlined.