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Old 15th December 2017, 07:43 PM   #4
ariel's Avatar
Join Date: Dec 2004
Location: Ann Arbor, MI
Posts: 4,236

"Soft" and "weak" are different.
Central Asian knives were always deliberately made soft: that made them unbreakable but easily sharpened : the natives used the bottom of a ceramic "piala", a teacup. Any small rock would do, too.
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