Determining touch-up time with pics
- Thread starter Xury
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The very edge of a properly sharpened razor lingers around a width of o.5µm
I personally have yet to come across a microscope capable of really showing what´s going on
A loupe or normal microscope for home use will not show signs of wear good enough.
It will only show you "major" flaws, like a wire edge or microchips.
The dulling effect a razor experiences during use can be microchipping,
fold over egdes or a rounded edge due to too much stropping over time.
(taken from the major theories I´ve heard or come up with)
These little flaws will have no effect on the looks of the bevel.
The best way to tell if a razor needs a touch up is .... shave with it!
If it doesn´t shave perfectly it is not sharp. It´s that simple.
All the tests we run for sharp edges won´t tell you if the edge is good.
I call these tests "negative" tests.
They will tell you if an edge is faulty!
If it´s not faulty, i.e. you don´t see anything under the microscope,
that doesn´t mean it will shave just fine.
The shave is the ultimate test
I personally have yet to come across a microscope capable of really showing what´s going on
A loupe or normal microscope for home use will not show signs of wear good enough.
It will only show you "major" flaws, like a wire edge or microchips.
The dulling effect a razor experiences during use can be microchipping,
fold over egdes or a rounded edge due to too much stropping over time.
(taken from the major theories I´ve heard or come up with)
These little flaws will have no effect on the looks of the bevel.
The best way to tell if a razor needs a touch up is .... shave with it!
If it doesn´t shave perfectly it is not sharp. It´s that simple.
All the tests we run for sharp edges won´t tell you if the edge is good.
I call these tests "negative" tests.
They will tell you if an edge is faulty!
If it´s not faulty, i.e. you don´t see anything under the microscope,
that doesn´t mean it will shave just fine.
The shave is the ultimate test
You can see it in pics, but you need an electron microscope in front of the lens...
What a low-power optical microscope lets you see are major issues (chips, badly malformed bevel, etc), which is extremely useful but not a panacea.
There was a guy on SRP a year ago that worked in a lab with an electron microscope, and taught himself to hone with it. lucky b*st*rd
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There was a guy on SRP a year ago that worked in a lab with an electron microscope, and taught himself to hone with it. lucky b*st*rd
That would be pretty interesting!
I think it's much easier to feel it than to see it. If your razor pulls, it needs to be touched up.
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- #6
maybe you will find this one interesting
http://mse.iastate.edu/fileadmin/www.mse.iastate.edu/static/files/verhoeven/KnifeShExps.pdf
http://mse.iastate.edu/fileadmin/www.mse.iastate.edu/static/files/verhoeven/KnifeShExps.pdf
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