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 Post subject: Black thing on japanese knife
PostPosted: Sun Feb 16, 2014 2:13 pm 

Joined: Tue Mar 05, 2013 1:47 pm
Posts: 74
Location: Oslo Norway
Hello
This is probably a stupid question but what are the black part of the knife blade many japanese carbon knife have?

An example is this knife:
http://www.chefknivestogo.com/takuna16.html



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 Post subject: Re: Black thing on japanese knife
PostPosted: Sun Feb 16, 2014 2:45 pm 

Joined: Sat Jan 04, 2014 8:57 pm
Posts: 572
The dark part of the blade is what is referred to as a kurouchi finish. The CKTG site defines this as: "a black carbonized finish put on knives to protect the steel and provide a barrier on carbon steel knives." It is often protected with a laquer coating but will wear off over time. The finish has been ground off towards the edge as the knife has been shaped, but remains on the upper portion of the knife above the bevels.


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 Post subject: Re: Black thing on japanese knife
PostPosted: Wed Feb 19, 2014 12:31 pm 
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Joined: Wed Aug 07, 2013 12:44 am
Posts: 704
Yep, Thats a Kurouchi. They can be laquer coating or more baked on, As has been presented, they help protect the carbon steel on some knives from oxidation. They can be removed, and may wear away on their own under regular maintenance.



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