Zwilling J.A. Henckels: Friodur Ice-Hardened Steel
FRIODUR is the proprietary name for Henckels' remarkable ice-hardening process given to their best quality blades. Friodur was trademarked and patented in 1939 as an advanced method for dissolving chromium carbide molecules, resulting in blades with optimum no-stain properties. Additionally, blades tempered this way were found to be harder and have longer lasting edges. Zwilling J.A. Henckels "Ice-hardening" was a first in cutlery that has ever since added a new dimension to the manufacturing of quality knives with premium stainless, high-carbon alloy blades. The Friodur trademark is your assurance of quality. It stands for perfection in cutlery and you'll find it on a wide assortment of Henckels professional blades.