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07-17-2011, 03:17 PM #1
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RogueRazor (02-11-2012)
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07-17-2011, 03:26 PM #2
Jimmy,
That stone is amazing, you really are lucky to find one that NOS. The one I have from you is amazing, I love it, I hug it in my sleep at night.
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07-17-2011, 03:27 PM #3
Wouldn't holding water longer be a matter of density ?
BTW, my posting the Escher seen above, within this thread, was due to the label "guaranteed soft." I think the relevance to this thread is demonstrated by Escher finding guaranteeing softness for a razor hone, which is what Eschers were/are, an important enough selling point to print and apply a special label noting that characteristic.Be careful how you treat people on your way up, you may meet them again on your way back down.
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07-17-2011, 03:39 PM #4
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07-17-2011, 04:30 PM #5
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Thanked: 2591Jimmy I am with you here.
I have been thinking about it for a while and I am not sure the water drop test is actually that indicative.
Example Escher, it is considered soft but it holds no water at all, it is just the binder is not hard compared to some Jnats.
On another hand I feel like the harder the stone the more compact it will be and thus the less water will it absorb. In this light water drop test will show that the hardest stone releases water the fastest. If anyone knows how to explain the test please do so.Stefan
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alx (07-17-2011)
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07-17-2011, 04:39 PM #6
the denser the stone the less water it will absorb density = hardness the porous the stone the more water it will absorb
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alx (07-17-2011)
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07-17-2011, 05:32 PM #7
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Thanked: 1371It seems to me that hardness would have more to do with the mineral composition of a stone than the density.
Maybe I'm not thinking of hardness the right way though.
Strange women lying in ponds distributing swords is no basis for a system of government.
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alx (07-17-2011)
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07-17-2011, 05:39 PM #8
That is why I repeat: there is no definition of hardness of a stone. Why should there be?
What could be the benefit of a unified hardness system for naturals?
BTW I had very hard and very quick coticules.
It remains difficult to find a definite consens for naturals
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07-17-2011, 06:04 PM #9
I too have a coticule that is extremely hard (a La Verte), but also is fairly fast on water. It's speed on slurry is on the slow side, but on water it catches up quick. Interestingly it is also the only coticule I have that leaves an edge that I can get weepers with, similar to a thuringian edge if I'm not careful, yet my thuringian I would describe as soft.
Trying to relate hardness of a stone to the edge it gives for naturals I think would be in vain, as there really is no uniformity IME.
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alx (07-17-2011)
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07-17-2011, 06:29 PM #10
Lesslemming. Maybe we do not need a hardness test or scale. If you could arrange and enforce the use of the word "hard" on this forum, then we would not. But as it stands almost all posts comment in some way about how hard this or that stone is. I myself do not feel that the hardness of a stone should be forefront, to me the imparitave is the cutting qualities of a stone. 20 strokes on a slightly softer stone does more for me than 100 strokes on a harder stone if the grit particles sizes are equal. And if sharpening is the goal, the blade is less distorted with the fewer strokes.
Also I think that Dr. Naka uncovered a unique answer as to why some edges are more comfortable than others. His description of Iwasaki-sans using his hands to describe the profile shape of a finished blade, all finger tips touching and both palms together, with fingers straight or with fingers bowed. The bowed being more comfortable for softer skinned beards. A slightly rounded blade profile. The perfectly straight flat profile may be sharper but usually harsher. A softer stone will aid with its free roaming grit to provide this splayed profile, the harder stone will provide a flat profile. Alx
P.S. I did not mean to use the term grinding as in coarse grinding or gross removal, but instead to mean just the mechanical act of steel removal at all or any grit levels. aLast edited by alx; 07-17-2011 at 06:32 PM.
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maxim207 (07-17-2011)