FIELD: medicinal, food, light industries. SUBSTANCE: collagen is isolated as an aqueous fiber dispersion (length is 2-4 mm, diameter is 0.06-0.26 mm). Dispersion is cryostructurized in acid or alkaline medium, tanned after cryostructurization and treatment with plasticizing component is carried out before cryostructurization or after tanning. Plasticizing component: glycerol or emulsion composition containing surface-active biopolymer and plasticizer of hydrophobic nature. After tanning and plasticizing collagen aqueous dispersion is subjected for, in some cases, for repeated cryostructurization. EFFECT: improved method of collagen material preparing. 3 cl, 2 tbl
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