DIYbanter - View Single Post - Putting a "cove" in the bottom of my chisels. How?

RicodJour

wrote:
RicodJour wrote:

You tap out the thin lamination ones, you grind out the thick
lamination ones. If you try to tap out a thick lamination one, you'll
crack it.

That makes sense from the physics standpoint, but I've never heard of a
Japanese chisel whose laminatied steel was so thick it couldn't be
tapped out.

Iyoroi. I think David Charlesworth has written on this (he was the
first person I saw who was grinding out his chisels, not tapping them).

I emailed a temple-builidng acquaintance in Japan about the lamination
thickness and this was his reply:
"Hello sir.
Thank you for your Q.
Thick steel is bad!
Because steel is thin, I can bend it.
I do it like a bimetal and bend it.
I tap a soft iron and grow volume.
I do not tap steel and do not grow it.
Steel is bent by pushing gently below as a result that soft iron
lengthened.
We must keep big back hollow as newer article.
Because I must tap soft iron.
Imagine Ski bord and figure skating shoose.
Do you understand?
Both of side end mirrored back hollow must become ruler. We call 'ashi'

means leg.
We love thin women's leg ,don't you?
We must keep thin leg (ASHI).
I will write about them on Ebay guide.
Please wait for a while.
I hate thick steel.
Exported Japanese tools must make thick steel.
Because ,many foreign owners sharpen back many times...
You know ,Steel will be lost!!!
Japanese chiselsmiths change thickness by a customer.
All of my blades are very thin.
Regards "

Can you see why I love this guy?

R