The beauty and the value of the samurai sword are chiefly on the
excellence of its flawless polish. The blade should never be touched
with the hand because it is dangerous and will lead to eventual rusting.
The best way to prevent rust is to keep the sword lightly oiled with
lightweight oil because the heavyweight oil will soil th
e interior of the scabbard by causing dust to collect. Apply oil once a
month to the sword if it is kept in a salty atmosphere.
If
in mountainous areas, the sword should apply with oil once every three
months. Do remember to wipe off the old oil from the sword with a soft
fabric, such as soft tissue before we reapply the oil to the blade.
Then, sprinkle special oil-removing powder or talcum powder on the blade
surface. After that, the powder cleaned before apply the light oil to
the blade. Ensure not to use metal polish on the blade or on the metal
mountings, especially the guard (tsuba). Finally, the tang should never
be polished because it contains vital information about the maker.
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