Inventors:
Irina M. Ermakova - Moscow, RU
Boris S. Khaytin - Brooklyn NY
Arcady L. Beleske - Marblehead MA
Assignee:
Boston Bay International, Inc. - Marblehead MA
International Classification:
C08H 106
Abstract:
A method of producing a collagen-containing material has the steps of comminuting untanned collagen-containing raw material, preparing from the raw material a collagen solution, preparing a leather paste from tanned collagen-containing waste, mixing the collagen solution and the leather paste to produce a mixture, adding a cross-linking agent to the mixture, freezing and unfreezing the mixture, and performing a preliminary treatment of the untanned collagen-containing raw material with a solution of alkali and a surfactant with pH less than 9. 5.