08-29-2019, 01:54 AM
Knowledge augments through better discrimination.
Discrimination between the keenness (apex width) and sharpness (width behind the apex) allows us to better define criteria of the clean, burrless edge tested on the sharpness tester.
Talking of the polished edges, we now see that:
- a burrless 10 dps edge will be scoring near 50 BESS, while the residual burr mushrooming against the test line will show over 90 BESS;
- a burrless 12 dps edge will be scoring 50-70 BESS, while the residual burr will show over 100 BESS;
- a burrless 15 dps edge will be scoring 70-90 BESS, while the residual burr will show over 120 BESS; and
- a burrless 20 dps edge will be scoring 110-130 BESS, while the residual burr will show over 150 BESS.
We now have an answer to the question haunting advanced sharpeners why we struggle to make the 20 dps edge score the same as the razor on the sharpness tester, despite all the efforts.
Discrimination between the keenness (apex width) and sharpness (width behind the apex) allows us to better define criteria of the clean, burrless edge tested on the sharpness tester.
Talking of the polished edges, we now see that:
- a burrless 10 dps edge will be scoring near 50 BESS, while the residual burr mushrooming against the test line will show over 90 BESS;
- a burrless 12 dps edge will be scoring 50-70 BESS, while the residual burr will show over 100 BESS;
- a burrless 15 dps edge will be scoring 70-90 BESS, while the residual burr will show over 120 BESS; and
- a burrless 20 dps edge will be scoring 110-130 BESS, while the residual burr will show over 150 BESS.
We now have an answer to the question haunting advanced sharpeners why we struggle to make the 20 dps edge score the same as the razor on the sharpness tester, despite all the efforts.
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