Result of restoration work
Before the work
blade length about 66cm, curvature 1.7cm, thickness at the base 7mm, width 2.8cm
This is a pitiful conditioned blade. The surface meat has hollows here and there. Additionally, a terrible engraving is put in the blade. A proper shape will be recalled by re-polishing with proper work. But the engraving is a fatal flaw. Next to the engraving, there is a trace that a blister is crushed. So the hamon line is vanishing there. The beauty of this blade is destroyed forever.
Steel is very good in some part. And rough layer appears in some part.
Hamon is gunome pattern and choji pattern, made of nioi (smallest particles) and ko-nie (small particles). It is bright in some part, and dim in some part.
Especially, the lower part on obverse side shows an amazing appearance with bright active hamon and utsuri. It suggests the excellent quality of this blade.
We planed to rescue this blade with recalling proper shape and mounting within shirasaya. But we can never help the terrible engraving. We started the restoration work.
After the work
New machi is settled, and new tang is shaped. The blade is polished to recall proper shape, and finished by the classical style.
blade length 69.5cm, thickness at the base 7mm, width 2.7cm
The engraving suggests how the blade was ground to recall proper shape.
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