The Science of Sharp Blog

Use a straight. You know it makes sense.
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Pauldog
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Re: The Science of Sharp Blog

Post by Pauldog » Tue Aug 27, 2019 5:08 pm

Possibly a dumb question, but this is an area where I know next to nothing, except a few facts I retained from elementary school, such as limestone being "softer" than quartz.

Could the grit number vs. actual "roughness" in use be related at all to the hardness of the underlying minerals? I'm guessing that a typical hone is made from a stone that's a mixture of minerals.

EL Alamein
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Re: The Science of Sharp Blog

Post by EL Alamein » Tue Aug 27, 2019 5:52 pm

drmoss_ca wrote:
Tue Aug 27, 2019 5:16 am
I can't believe the effective grit of a Swaty is 600! They feel as smooth as glass and you get an edge far better than from a 600 grit stone. Perhaps it's not the size of the abrasive that matters here, but the microscopic scratch pattern on the surface (just like a 2k-polished Arkansas or Spyderco UF is completely changed in character by such polishing).
Well you have a point there and I think he might agree.

The pictures he posts and the comments he makes say that grit is another story and a poor characteristic to judge a hone by. The pictures and his comments show that even though there are very large inclusions in these hones they don't protrude. This accounts for their performance being better than their judged grit rating.

He also mentions, similar to your point about the Spyderco, that lapping them makes the difference.

I still don't like them and think they should be avoided. Those inclusions are going to come loose at some point and maybe en masse if the aged binder starts to give away. And I think they will sooner or later. Probably sooner given their age.

If one gets a good one it's a crap shoot and a matter of time before it becomes a bad one IMHO. But, hey, there are many roads to Rome enjoy the one you're on.

Chris

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Re: The Science of Sharp Blog

Post by brothers » Tue Aug 27, 2019 7:01 pm

Looking back, I wonder why the Chinese 12000 aka CK12 was so effective, but getting the result generally wanted took an exhausting number of laps.
Gary

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drmoss_ca
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Re: The Science of Sharp Blog

Post by drmoss_ca » Wed Aug 28, 2019 2:23 am

brothers wrote:
Tue Aug 27, 2019 7:01 pm
Looking back, I wonder why the Chinese 12000 aka CK12 was so effective, but getting the result generally wanted took an exhausting number of laps.
That's an interesting definition of 'effective'!
"Je n'ai pas besoin de cette hypothèse."
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Re: The Science of Sharp Blog

Post by brothers » Wed Aug 28, 2019 9:14 am

drmoss_ca wrote:
Wed Aug 28, 2019 2:23 am
brothers wrote:
Tue Aug 27, 2019 7:01 pm
Looking back, I wonder why the Chinese 12000 aka CK12 was so effective, but getting the result generally wanted took an exhausting number of laps.
That's an interesting definition of 'effective'!
:D This is the definition I used: "successful in producing a desired or intended result."
The edges it produced were wickedly sharp.
Gary

SOTD 99%: soaps & creams, synthetic & badger brushes, General V2 by Colonial, Kai & Schick blades, Superior 70 aftershave splash + menthol + 444

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