Atoma 140

Sadden

Sadden

Joined
Dec 19, 2011
Messages
795
Its coarse , but with some time , and technique , you can get a really nice "toothy" edge straight off the Atomas. This particular knife didn't stay at this finish much longer than it took to shoot the video , in fact it wound up going all the way up to 30k. But since I was here anyways I figured id show you all what these are capable of :)

[video=youtube_share;j032eLxxhzc]http://youtu.be/j032eLxxhzc[/video]
 
Edge looks pretty rough for 30k, looks like a bit of abrasive stuck in the surface too. Probably cuts pretty good though.
 
On a harder steel like this this is about right for a 30k. Theres one or two spots , like on the right hand side where the lights starting to wash out where you can see a larger "chip". The steel is quite thin at this level of finish and even at a steeper angle has a hard time supporting itself right at the edge of the edge.

The little lumps are kind of like steel shavings that haven't come all the way off. Almost like rolling a snowball if you will.

The knife performs exceptionally well , even without stropping.
 
I've looked at a lot of micrographs and I disagree.
 
If those lumps are tail end of grind troughs (burrs) or more likely bits of abrasive (was it finished on a waterstone?) they can be removed by stropping on paper. At 30k there should appear to be near total edge uniformity especially at this magnification, even along the apex.

Have you experimented with using a weak indirect backlite under the edge and a slightly stronger one from above? Multiple light sources with less intensity or a cloth over the light might help avoid some of the wash-out. Can be very difficult to control the lighting at high magnification.
 
Chris "Anagarika";13444617 said:
Maybe it's only me, but I'm stumped with second picture. What is it? :confused:
Click to expand...

From top to bottom..

Blade
Bevel With Reflection
Monzen Aoto

Its a reflection shot showing the bevel reflecting the surface of a Japanese Natural.
 
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