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On the craft

Understanding Coreless

無芯構造(Coreless)在日本是一種非常獨特的製刀方式,但在美國卻更為常見。這種結構中,夾鋼與芯鋼之間沒有明確的界線,整片刀刃是由一塊相當均勻的大馬士革鋼所構成,而該大馬士革鋼則由兩種或以上的可硬化鋼材鍛打而成。

經典的範例是將 1084 碳鋼與 15N20 鎳鋼層疊鍛造,這在美國刀匠中極為普遍。然而在日本,由於鍛造大馬士革鋼坯料耗時費力,無芯構造極為罕見,通常只出現在極其昂貴的收藏級刀具上,其價格有時甚至超過享有盛譽的本燒(Honyaki)刀具。

日本無芯刀具常見的材質組合為青鋼二號與白鋼二號,兩者合金成分的差異使其在受控條件下蝕刻後能呈現出一定的對比度。更珍貴的無芯刀具可能會加入白鋼一號或青鋼一號以創造多變的色澤。例如,橋本莊市等大師曾將 13 種不同的鋼材與少量鐵混合鍛造成大馬士革鋼,打造出宛如來自異世界的獨特紋路。因此,無芯刀具在日本刀具市場中較為罕見,也極具收藏價值。

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What knives use this construction

See the product cards below for the specific knives in our range that feature Coreless construction — every product listing includes the steel, profile, blade construction, and surface finish so you can compare across our catalog.

Care

How to maintain it

Hand wash with warm water and mild detergent, dry immediately with a soft cloth. Avoid the dishwasher, abrasive scouring pads, and prolonged contact with acidic foods. Carbon-steel knives benefit from a thin coat of food-safe camellia or mineral oil between uses.

Questions answered

Frequently asked about Coreless

What is Coreless blade construction?

無芯構造(Coreless)是一種在日本非常獨特、但在美國更為常見的刀具製造方式。這種結構中,夾層鋼與芯鋼之間沒有明確的界線,整把刀是由兩種或更多種可硬化鋼材鍛打而成的均勻大馬士革鋼。經典的範例是將 1084 碳鋼與 15N20 鎳鋼層疊鍛造,這被大多數美國刀匠所採用。但在日本,由於鍛造大馬士革鋼坯料耗時費力,無芯構造極為罕見,通常只出現在極其昂貴的收藏級刀具上,其價格有時甚至超過尊貴的本燒(Honyaki)刀具。日本無芯刀具常見的鋼材組合是青鋼二號與白鋼二號,兩者合金成分的差異使得在受控條件下蝕刻後能呈現出一定的對比度。更稀有的無芯刀具可能會加入青鋼或白鋼一號以創造不同的色調層次。例如,橋本莊市等大師曾將 13 種不同鋼材與少量鐵混合鍛造成大馬士革鋼,創造出令人驚嘆的圖案。因此,無芯... A full process description and historical context appear in the detailed section on this page.

How is a Coreless blade constructed?

The Coreless construction is produced through a specific combination of forging, lamination, and grinding processes characteristic of traditional Japanese knife-making. See the description above for details specific to this construction.

What knives typically feature Coreless construction?

See the product cards below for the specific knives in our range that feature Coreless construction — every product listing includes the steel, profile, blade construction, and surface finish so you can compare across our catalog.

How do I care for a knife with Coreless construction?

Hand wash with warm water and mild detergent, dry immediately with a soft cloth. Avoid the dishwasher, abrasive scouring pads, and prolonged contact with acidic foods. Carbon-steel knives benefit from a thin coat of food-safe camellia or mineral oil between uses.

Explore the catalog

Japanese knives with the Coreless construction

6 knives in our current range