Production

From the blank to the finished scissor

2. Machining the blank

The blanks leave the forge to be further processed by machining. The following manufacturing steps are being carried out:

a) milling of the closing surfaces (handle, joint area projection and the blade inset)

b) drilling of the screw or stud hole

c) cutting the thread into the lower shear blade

d) stamping the trademark onto the joint area of the lower shear blade.

3. Hardening

The blade and joint area of forged scissors and shears are hardened right up to the crescent. The shanks must remain soft, otherwise straightening work cannot be carried out later.

The most important manufacturing steps are:

a) heating in a salt bath

b) chilling in an oil bath

c) rustproof scissors: undercooling using
ZWILLING J.A. HENCKELS special ice-hardening process FRIODUR These scissors are marked with “FRIODUR”.

d) tempering: this heat treatment takes tension off the steel

e) hard-straightening: the scissor blades are pressed against each other (draw) and turned (twist). ZWILLING J.A. HENCKELS has optimised this hardening process.

ZWILLING J.A. HENCKELS uses the special ice-hardened steel for the Original Kitchen Shears and the TWIN scissors. The ice-hardening process stands for a further quality-determining refinement of the material.