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Why Avoid Using Only Caustic Soda for Degreasing Felts 1. Risk of Damaging the Felt Caustic soda is highly alkaline and, if used alone and at high concentrations, can: degrade the felt fibers (especially if synthetic or blended), harden or stiffen the material, shorten the overall service life of the felt, cause felting and reduce absorbency. 2. Partial Removal of Grease Caustic soda is not an effective solvent for complex fats (such as animal lipids present in hides).Without the addition of...

In sammying and setting-out machines, the felt  plays a far more important role than most people realize. It’s not just a passive layer — it’s the core of the process , responsible for transferring, absorbing, and cushioning every hide that passes through. A healthy, clean felt means more than dry hides. It means better leather, longer-lasting mechanical parts , and greater production stability. Because when the felt does its job, it also protects the bearings, shafts, and rollers from...

In today’s leather industry, every minute of machine downtime is money lost — sometimes thousands of euros per hour. And yet, spare parts...