| abstract |
A leather production method for the production of a reptile leather, comprising: a chrome tanning step in which chrome tanning is carried out on the reptile skin to obtain a leather; an oil bath greasing dyeing stage in which dyeing and oil bath greasing are carried out simultaneously on the leather subjected to chrome tanning; and a finishing stage in which the finishing is carried out on the leather subjected to dyeing and oil bath greasing, the method also comprising a stage of treating the hexavalent chromium of, before the finishing stage, applying a compound hexavalent chromium reducer which can reduce the hexavalent chromium into trivalent chromium to the leather subjected to the chrome tanning in the chrome tanning step, wherein the hexavalent chromium reducing compound comprises an organic compound (A) having a structure represented by the following Formula (1) and can act to reduce hexavalent chromium to trivalent chromium, which has a hydroxyphenyl group and has no aldehyde group and no carboxyl group: ** (See formula) ** where R1, R2, R3, R4 and R5 are each independently a substituent consisting of C, H, O and R1 or R2 and R3, R4 or R5 can be joined together to form a ring. |