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Mike Davis
01-21-2012, 12:59 AM
Ok...I got this knife, it is a small deba(100mm) and it has a layer of copper between the jigane and the hagane. Has anyone ever seen this before?
http://i30.photobucket.com/albums/c303/munky2/2012-01-20_23-24-44_56.jpg
http://i30.photobucket.com/albums/c303/munky2/2012-01-20_23-24-33_598.jpg

Just thought it was kinda cool, but didn't know that was possible.

PierreRodrigue
01-21-2012, 01:02 AM
There is a maker on the west coast, that does a sanmai tool steel core, but has layers of copper in the damascus cladding. Quite striking to look at for sure.

ajhuff
01-21-2012, 01:03 AM
cold headed?

-AJ

Marko Tsourkan
01-21-2012, 01:18 AM
You see nickel layer often, to prevent carbon migration, but copper I have not seen before.

M

JBroida
01-21-2012, 01:37 AM
I see it on some older japanese knives and scissors

Lefty
01-21-2012, 01:43 AM
Is it dangerous? I know copper pots need to be retinned once you can see the copper showing through on the inside.

sachem allison
01-21-2012, 01:46 AM
Mike is that the watanabe? I do believe some of his older debas are made that way.

sachem allison
01-21-2012, 01:49 AM
Is it dangerous? I know copper pots need to be retinned once you can see the copper showing through on the inside.

The copper only becomes a problem with acidic foods. That's why you re-tin those pots. it's the salts produced by the reaction of food acids and the copper that can become toxic, but you would need alot of it. I imagine with the deba, since it is dealing with fish you shouldn't have an issue.

Mike Davis
01-21-2012, 02:05 AM
Yes it is a watanabe. I like the look....sweet stuff :)

sachem allison
01-21-2012, 02:07 AM
I'm glad you like it. that whole set is filled with great cutters. wait til you use the nakiri.

JBroida
01-21-2012, 02:10 AM
for reference, another older knife with copper in between the layers:
http://www.japaneseknifeimports.com/shop/media/catalog/product/cache/1/image/800x600/518a337f71d8af45c99bc01d0812e43a/i/m/img_0062_9.jpg

i also saw it in scissors when i was visiting a specialty store in japan... the maker mad passed away and was the last scissor maker doing that kind of lamination by hand

WillC
01-21-2012, 07:36 AM
Very interesting. I've seen copper and iron laminated by solid state diffusion in mokume. Ariel Salaverria has a tutorial on 1070/copper welded at full heat in a can. I hadn't considered it an alternative to Nickel as a carbon barrier. I wonder why the trend moved to nickel as its 10 times the price. Are these examples stainless clad?

Mike Davis
01-21-2012, 11:39 AM
I'm glad you like it. that whole set is filled with great cutters. wait til you use the nakiri.
I have used it...Fantastic veggie knife. I am rather happy with all of them..Even more so when i get them all rehandled :)

sachem allison
01-21-2012, 01:26 PM
I have used it...Fantastic veggie knife. I am rather happy with all of them..Even more so when i get them all rehandled :)

if i hadn't of sold them I was going to have them rehandled, but i really don't use single beveled knives.

sachem allison
01-21-2012, 01:28 PM
Very interesting. I've seen copper and iron laminated by solid state diffusion in mokume. Ariel Salaverria has a tutorial on 1070/copper welded at full heat in a can. I hadn't considered it an alternative to Nickel as a carbon barrier. I wonder why the trend moved to nickel as its 10 times the price. Are these examples stainless clad?

No , the Watanabe is carbon steel, I don't remember exactly what he used to use back in the day when I got these before he became famous and I couldn't afford his work.

JBroida
01-21-2012, 02:04 PM
jin is also carbon