Laminating with copper?

[Mike Davis]

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?

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

 

[PierreRodrigue]

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]

cold headed?

-AJ

 

[Marko Tsourkan]

You see nickel layer often, to prevent carbon migration, but copper I have not seen before.

M

 

[JBroida]

I see it on some older japanese knives and scissors

 

[Lefty]

Is it dangerous? I know copper pots need to be retinned once you can see the copper showing through on the inside.

 

[sachem allison]

Mike is that the watanabe? I do believe some of his older debas are made that way.

 

[sachem allison]

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]

Yes it is a watanabe. I like the look....sweet stuff

 

[sachem allison]

I'm glad you like it. that whole set is filled with great cutters. wait til you use the nakiri.

 

[JBroida]

for reference, another older knife with copper in between the layers:

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]

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]

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]

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]

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]

jin is also carbon