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Lifespan Of A Shirasaya?


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An interesting question. I know that a shirasaya's "shelf life" exceeds 20 years, as I've had several blades that have been well-protected in mine for longer than that. Shirasaya are usually replaced when a blade is (re-)polished, but I honestly haven't heard of any that were replaced for any other reason besides that & damage.

 

Ken

 

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The first reason is to make sure that the new profile of polished blade is held securely by the new shirasaya, but probably mostly because it ensures that none of the crud that gradually accumulates in the saya (oil, dust, grit, etc.) doesn't mess up the new polish.

 

Ken

 

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