Patent ID: 7033402
Filing Date: 2006-04-25
Classification: C14C

Abstract:
1. A transposed process for making a wet processed leather, said process comprising: (a) treating an untanned pelt, which has been delimed and/or bated, with fat liquor at a pH in the range of 5.0–8.5 and at a temperature in the range of about 20–55° C., wherein the fat liquor is present in the range of 2–6% w/w (weight of fat liquor to weight of pelt); (b) stirring the product of step (a) for a period of about 3 hrs to obtain a fat liquored pelt; (c) mixing a tanning agent at a pH in the range of 5.0–8.5 in the fat liquored pelt of step (b), wherein the tanning agent is present in the range of 4–25% w/w (weight of tanning agent to weight of pelt); and (d) adjusting the product of step (c) to obtain a pH in a range of 3.5–4.5 in about 3 hrs to obtain a wet processed leather.