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**mikelangr** · 07-20-2010, 01:31 PM

I doubt it is a preservative since mineral oil needs no preservatives. It is something leftover from the refining process likely a petroleum compound of some type but unlikely to have any corrosive or other harmful effect on your sword. When you buy mineral oil you should look for USP grade.

07-20-2010, 01:31 PM	#4
mikelangr Join Date Oct 2005 Posts 622 Senior Member	I doubt it is a preservative since mineral oil needs no preservatives. It is something leftover from the refining process likely a petroleum compound of some type but unlikely to have any corrosive or other harmful effect on your sword. When you buy mineral oil you should look for USP grade.
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