A tanning agent-free leather making method is provided. A raw hide is subjected to controllable dehydration with a molecular sieve-polar organic solvent composite dehydration media to achieve a dehydrated hide, and then a tanning agent-free leather is prepared by increasing the surface roughness of the dehydrated hide and reducing the surface energy of the dehydrated hide. The present disclosure does not use any metal or non-metal tanning agent, which is eco-friendly. The present disclosure breaks the balance of water distribution between the raw hide and the polar organic solvent, which realizes a multi-medium self-driven directional controllable dehydration of the raw hide, effectively solving the problems during dehydration of the raw hide only using polar organic solvent. The molecular sieve-polar organic solvent dehydration system is easy to recover and can be recycled for the controllable dehydration of the raw hide multiple times. Therefore, a brand-new clean leather making technology is provided.

A tanning agent-free leather making method is provided. A raw hide is subjected to controllable dehydration with a molecular sieve-polar organic solvent composite dehydration media to achieve a dehydrated hide, and then a tanning agent-free leather is prepared by increasing the surface roughness of the dehydrated hide and reducing the surface energy of the dehydrated hide. The present disclosure does not use any metal or non-metal tanning agent, which is eco-friendly. The present disclosure breaks the balance of water distribution between the raw hide and the polar organic solvent, which realizes a multi-medium self-driven directional controllable dehydration of the raw hide, effectively solving the problems during dehydration of the raw hide only using polar organic solvent. The molecular sieve-polar organic solvent dehydration system is easy to recover and can be recycled for the controllable dehydration of the raw hide multiple times. Therefore, a brand-new clean leather making technology is provided.

A process is provided for marking leather manufactured from hide with an XRF-identifiable marker, the process comprising treating a hide or processed leather with a formulation comprising at least one XRF-identifiable marker to embed said marker in the hide or processed leather, to thereby obtain a marked hide or marked leather, wherein the XRF-identifiable marker is not a native material to a hide or leather or involved in a process for its manufacturing.

A method for preserving hides, skins and pelts prior to tanning, without salt-curing. The hides are fatliquored, pickled and dried, all prior to tanning. The method may include the preliminary steps of washing, fleshing, liming and unhairing followed by the steps of fatliquoring, deliming, bating, pickling and drying. The method avoids the environmental damage caused by salt-curing. The treated hides are dry, flexible and readily rehydrated for further processing.

A method for preserving hides, skins and pelts prior to tanning, without salt-curing. The hides are fatliquored, pickled and dried, all prior to tanning. The method may include the preliminary steps of washing, fleshing, liming and unhairing followed by the steps of fatliquoring, deliming, bating, pickling and drying. The method avoids the environmental damage caused by salt-curing. The treated hides are dry, flexible and readily rehydrated for further processing.

A method for preserving hides, skins and pelts prior to tanning, without salt-curing. The preliminary steps of washing, fleshing, liming, unhairing, deliming and bating the hides are followed by the steps of fatliquoring, pickling and drying. The method avoids the environmental damage caused by salt-curing. The treated hides are dry, flexible and readily rehydrated for further processing.

A method for preserving hides, skins and pelts prior to tanning, without salt-curing. The preliminary steps of washing, fleshing, liming, unhairing, deliming and bating the hides are followed by the steps of fatliquoring, pickling and drying. The method avoids the environmental damage caused by salt-curing. The treated hides are dry, flexible and readily rehydrated for further processing.

The present invention relates generally to a system and method of tracking leather raw materials through the supply chain to create a source verifiable finished leather product through one or more applications of DNA taggants during the leather manufacturing process and the subsequent authentication of said DNA taggants.

The present invention relates generally to a system and method of tracking leather raw materials through the supply chain to create a source verifiable finished leather product through one or more applications of DNA taggants during the leather manufacturing process and the subsequent authentication of said DNA taggants.

Provided herein is a method of at least partly removing a biological deposit, such as a dag, from the skin of an animal. The method includes administering to the biological deposit an effective amount of a composition containing a keratinase, and optionally one or both of a reducing agent and a surfactant. Also provided is a composition for use in the aforementioned method as well as a method of making same.