wiki-Yakimodoshi

• Definition:
  Yakimodoshi, or tempering, is a post-hardening heat treatment process that balances hardness and toughness in steel, ensuring that knives remain both sharp and durable.
• Details:
  After yakiire (quenching), steel becomes extremely hard but brittle. Yakimodoshi involves reheating the steel at controlled temperatures to relieve stress, stabilize the internal structure, and enhance wear resistance. This process makes blades less prone to cracking while preserving their cutting ability.
• Comparison:
  Unlike yakiire, which maximizes hardness, yakimodoshi slightly softens the steel to increase toughness and structural stability. Compared with untempered hardened steel, yakimodoshi-treated blades retain their sharpness while resisting breakage, making them far more reliable for daily use.
• Practical Use:
  Knives treated with yakimodoshi maintain a sharp edge over long periods and withstand the stresses of professional kitchens. This balance of edge retention and toughness ensures both safety and efficiency in food preparation.
• Cultural Note:
  In Japanese craftsmanship, yakimodoshi is regarded as a delicate and essential step that highlights the artisan’s skill. Proper control of temperature and timing reflects generations of accumulated knowledge, symbolizing the traditional pursuit of harmony between strength and resilience in Japanese blades.

 

Related websites
The Making of Japanese Knives