Thread: Good Info - has anyone seen this

I was looking for info on knife honing and come upon this:

straight razor | scienceofsharp

Good info on a lot of the aspects of honing

Very interesting read. Thanks for sharing. Some amazing photography. Of course the analysis really does boil down to (sorry can't attribute this quote as can't remember the member who said it ) rub on stone until sharp, anything else is just an improvement in efficiency. (Or something like that) lol

I really like how it emphasizes the importance of linen (or other cloth like material) strop when preparing the edge for shaving. You can really see the difference the strop does to the edge before it even touches the leather.

Who is the website's author?

Nice resource
I wonder about the J-nat slurry though. The shape of the particles is weird, I took images of slurry a few years a go and it looks a bit different.
Here a pic from a book by the Kyoto stone association


you can see the layered structure of the slurry and the theory is that that is where the break down occurs with honing.

His description of the slurry getting black with metal swarf is also not very consistent with a finishing stone. Those usually do not abrade so much as to darken the slurry significantly.

Any way there is no hard evidence that I know of what happens really with the slurry.

Great read

Originally Posted by mainaman

Nice resource
I wonder about the J-nat slurry though. The shape of the particles is weird, I took images of slurry a few years a go and it looks a bit different.

you can see the layered structure of the slurry and the theory is that that is where the break down occurs with honing.

His description of the slurry getting black with metal swarf is also not very consistent with a finishing stone. Those usually do not abrade so much as to darken the slurry significantly.

Any way there is no hard evidence that I know of what happens really with the slurry.

He also referred to the Nakayama Asagi (the source of the analyzed slurry) as having a "red-orange colour." That seems odd.

Originally Posted by Utopian

He also referred to the Nakayama Asagi (the source of the analyzed slurry) as having a "red-orange colour." That seems odd.

Ron I missed that good catch.

Always looking for new honing help, thanks!

Originally Posted by Utopian

He also referred to the Nakayama Asagi (the source of the analyzed slurry) as having a "red-orange colour." That seems odd.

Some Jnats seem to encourage rusting during the honing process. My Yaginoshima does this but not my Nakayama.
I'm also curious as to why the bevel gets more polished & the scratches get finer if the slurry doesn't break down as the blog postulates.