Sharpness Chart

[KnifeGrinders]

KG, thanks for sharing your very useful sharpness chart. Appreciated.

The Australian Tally Ho rolling paper is really ultra-thin test medium! I think it weighs only 4 grams per metre square. If I am correct the paper thickness is about 5 microns (≈ 0.0002") only.

For comparison, human hair thickness is between 50 and 100 microns (≈ 0.002 to 0.004"). So, human hair is at least ten times thicker than the ultra-thin Tally Ho rolling paper. 

Some sharpeners in this country use for knife sharpness testing standard light weight rolling paper which has about 12 grams per metre square, so it is three times thicker than your test medium. I have seen a video where very sharp/shaving sharp knife cuts this paper, but in my opinion it was not a quite clean push cut.

Jan

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Very interesting.
No wonder this Tally Ho paper test requires the same level of keenness as the top hanging hair tests.
Any chance you can remember the source for its thickness being about 5 microns?

Thank you, Vadim