In the tanning industry the unhairing stage concerns the removal of animal hair from the skin by chemical burning of the hair root, or by chemical degradation of the hair shaft. The type of hair removal depends on the type and length of the hair itself.

Unhairing
Unhairing effluents treated by an activated sludge system
Study on enzymatic unhairing process for pigskin garment leather
Kinetics of enzymatic unhairing by protease in leather industry
Skin unhairing proteases of Bacillus subtilis: production andpartial characterization
Recovery and reuse of chemicals in unhairing, degreasing and chromium tanning processes by membranes ☆
Application of alkaline protease isolated from Alcaligenes faecalis for enzymatic unhairing in tanneries
An approach to cleaner production: from hair burning to hair saving using a lime-free unhairing system.
Green solution for tannery pollution: Effect of enzyme based lime-free unhairing and fibre opening in combination with pickle-free c...
Production of protease by Bacillus amyloliquefaciens in solid-state fermentation and its application in the unhairing of hides and ...