This man's testing and charting of such just blew me away!! His summaries are spot on IMO and his opinions virtually match mine based on blades I have used that he has tested. Now I know even better why I like the blades I like.
https://www.refinedshave.com/razor-blade-sharpness-summary/
It makes for an interesting read but blade sharpness is a very subjective thing.
Technically you're correct about the unit of measurement, however a force gauge works in exactly the same way as a scale it just displays the result in a different unit. Not surprising really considering that weight is merely the measurement of force exerted on a mass by gravity.
Without having a force gauge to hand a scale will perform just as well if all you want is a relative measurement.
Yeah, I get all that but the 'machine' isn't shaving with the blade- you are. And if you don't think it's sharp mate, then it ain't sharp!
A scale measures in kg. Hence, it doesn't measure force
If I may draw your attention to definition 2 below, you'll see (that's) exactly what it does do.
weight
[weyt]
See more synonyms on Thesaurus.com
noun
1.
the amount or quantity of heaviness or mass; amount a thing weighs.
2.
Physics. the force that gravitation exerts upon a body, equal to the mass of the body times the local acceleration of gravity:commonly taken, in a region of constant gravitational acceleration, as a measure of mass.
3.
a system of units for expressing heaviness or mass.
I must be reading this wrong, because Derby is shown sharper than Feather???
Yes, you're reading it wrong.
So your reply to physics is...dictionary? Then, pray tell, why is force measured in Newtons and not in kg?
This is why:
https://en.wikipedia.org/wiki/Mass_versus_weight
What does this have to do with measuring sharpness by weight? Nothing. Does measuring weight equals to measuring force? No. The weight is only the particular force the earth exerts on everything on it. What does this have to do with a blade sharpness of cutting force? Nothing. So Isaac Newton's reputation can live another day.
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