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  1. I have no idea either. But it is well documented...

    I have no idea either. But it is well documented that elements much lower on the MOHS scale than steel when used in powder form leave a more refined (ie sharper) edge than just using an ordinary...
  2. As far as I can make out, the main thing...

    As far as I can make out, the main thing contributing to the razors edge was lead. Old pewter came in three grades, each grade containing from 78 - 95% tin plus traces of antimony, zinc, etc. ...
  3. The 1900 Handbook of Subsistence Stores for the...

    The 1900 Handbook of Subsistence Stores for the War Dept says that:

    The razor strops furnished for the use of the Army consist of two parts or, rather, two strops combined in one implement. One...
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