KAIZEN

Seki, Gifu --:-- · Forge at 1,300 °C

Commission
Damascus pattern on a knife blade

鋼 · Steel

Sixty-sevenlayers.

Three steels from Yasugi and Echizen. Each makes a different knife; each is forged the same way.

(01) — Fold after fold

1layers

One bar of steel

Heat, hammer flat, cut, stack, forge-weld. Six folds make sixty-four layers; wrapped around a hard core of carbon steel they make sixty-seven.

1×2×4×8×16×32×64+ core

(02) — Choose

Three steels.

Carbon steel takes the sharpest edge and develops a patina. Stainless Damascus forgives a wet board and a busy week.

SteelHardnessEdgeEasy carePrice
Shirogami #1
white paper steel
63 HRCbase
Aogami #2
blue paper steel
62 HRC+€120
VG10 Damascus
stainless, 67 layers
61 HRC+€380
Glowing charcoal

(03) — Aogami #2

Blue papersteel.

Carbon steel with chromium and tungsten from Hitachi’s Yasugi works. Named for the blue paper it is wrapped in.

It holds an edge longer than any steel we know, and asks for a dry towel after every use.

Hot iron at the forge

(04) — Shirogami #1

White papersteel.

The purest carbon steel: iron and carbon, almost nothing else. It sharpens fastest and gets the keenest edge.

Sushi chefs choose it. So do we, for the yanagiba.

Two Damascus knives

(05) — VG10 Damascus

Stainless,sixty-seven layers.

A VG10 core at 61 HRC, clad in sixty-four layers of nickel and stainless steel, etched to show the folds.

The pattern is different in every knife: it is the map of every hammer blow.