Abstract
This report shows contents of the research about “the sharpness of the plane” performed as a Takenaka Carpentry Tools Museum collaboration research project in 2007-2008.
We arranged the meaning of words about the sharpness conveyed through a craftsman. And we distributed a plane according to the each hardness with modern steel and produced it and made the characteristic clear in what I sharpened it for tree classification and examined.
1 We forged it and performed quenching equally, and a metal organization baked appearing of a thing of pass quality and sharpened it by setting of the return, and a clear difference was born for the result of the examination, and the evaluation of the plane was accompanied by a difference.
2 About words of “the sweet sharpness” to use when a carpenter expressed the sharpness of the plane, that was connected with the touch of the finish and the pull of the cut in a cedar and the Hinoki was confirmed.
3 Although we felt that it is easy to polish even the high hardness when we used high carbon steel for a plane blade, it was stable by the last blade charge account. And that would perform it became difficult was confirmed.
