1. A method of producing a keratin hydrolyzate, comprising the steps of: i) mixing keratin material with a protease； and ii) mixing the keratin material with the chemical； where step ii) is carried out: a) after step i)； b) during step i) when the selected protease is hydrolyzed under the pH conditions used for the chemical reaction and / or c) to step i), when the selected protease hydrolyzes under the reaction conditions used for the chemical reaction. 2. A method for the commercial destruction of keratin, comprising the steps of: i) reacting a keratin material with a protease； and ii) reacting the keratin material with a chemical； where step ii) is carried out: a) after step i)； b) during step i) when the selected protease hydrolyzes under the pH conditions used for the chemical reaction and / or c) to step i), if the selected protease hydrolyzes under the pH conditions used for the chemical reaction. 3. A method according to claim 1, characterized in that the selected protease hydrolyzes under the pH conditions used for the chemical reaction. The method of claim 1, wherein the protease is derived from the genus Bacillus. 5. The method of claim 1, wherein the protease comprises a polypeptide sequence as defined in any of SEQ ID NO: 1 or 2, or a functional fragment or variant thereof that is at least 75% identical to the sequence under any of SEQ ID NO : 1 or 2 within at least 50 amino acid residues. 6. The method of claim 1, wherein the protease can be transcribed from a nucleic acid sequence encoding a protease that is at least 75% identical to either SEQ ID NO: 3 or SEQ ID NO: 4, or a nucleic acid sequence capable of hybridization with a nucleic acid sequence of SEQ ID NO: 3 or SEQ ID NO: 4 or their complementary sequences in hard1. Способ получения гидролизата кератина, включающий стадии:i) смешивания кератинового материала с протеазой； иii) смешивания кератинового материала с химикатом；где стадию ii) проводят:a) после стадии i)；b) во время стадии i), когда вы
