For the BESS community it is important to understand the relationship between edge sharpness, BESS readings and thinness of the edge apex. Because the edge width of a DE razor blade is only 1/10 th of one micron we have no direct personal experience with such a very thin piece of metal.
On the other hand from personal experience we know that the sun light may be separated by prism into spectral colours. Each spectral colour can be associated with some wavelength of light. The wavelength of violet colour is approximately equal to the edge width of a sharp knife.
The visible spectrum goes from violet colour which has a wavelength of some 0.4 micron to red colours with some 0.7 micron.
When we measure BESS 200 gf on a sharp knife, we know that the edge width should be some 0.4 micron*. This edge width is equal to the wavelength of a violet colour!
Similarly, when we measure BESS 300 gf on a knife we know that the edge width should be some 0.5 micron, which is equal to the wavelength of a blue colour.
Jan
*P.S.: I.e. 4 times more than DE razor blade which has 0.1 micron edge width and 50 gf BESS.
On the other hand from personal experience we know that the sun light may be separated by prism into spectral colours. Each spectral colour can be associated with some wavelength of light. The wavelength of violet colour is approximately equal to the edge width of a sharp knife.
The visible spectrum goes from violet colour which has a wavelength of some 0.4 micron to red colours with some 0.7 micron.
When we measure BESS 200 gf on a sharp knife, we know that the edge width should be some 0.4 micron*. This edge width is equal to the wavelength of a violet colour!
Similarly, when we measure BESS 300 gf on a knife we know that the edge width should be some 0.5 micron, which is equal to the wavelength of a blue colour.
Jan
*P.S.: I.e. 4 times more than DE razor blade which has 0.1 micron edge width and 50 gf BESS.