Hand Tools

Subject:
finger pressure...

David Weaver
..I can't remember if this is why, but one of the things I noticed once microscope viewing became and on and off again thing is that you have to rely on bias and pressure to finish an edge (it can be done with small bevels, but in my iron testing, I attempted to expedite the process by using the ruler trick with the old steel ruler that charlesworth suggested in his original video - something like 1/2mm).

If a blade is used with the cap iron, it turns out to be easier to refresh a well worn blade without the back bevel - the bias is still needed due to curvature at the edge, in combination with bevel honing.

Once the back bevel starts to become significant, then it's a grab bag between determining how much you should actually do to the back of the iron (to get from https://i.imgur.com/Xv9vsRI.jpg to https://i.imgur.com/vn2UAFI.jpg generally took more ruler tricking than one would guess).

As the abrasive gets really fine, it's easy to come up with a process that takes a while and still doesn't remove all of the wear on the back side under the scope, exacerbated further as the back bevel grows.

With faster media on the back (even if followed by slower media) and finger pressure on places where you want the abrasion to occur, it's a lot easier to finish.

One of my sharpening stone omnibus objectives was to see not just whether or not media is suitably fine, but how fast it would do something like refresh all of the wear off of the back of an iron. If one type can do it in 20 seconds, and another takes 45, the former is likely to result in better edges.

Several times a year, I get tools from people, sometimes none in one year, and then several the next. I would secretly like to ask them to do their best sharpening job so that I can accurately diagnose what their tool issue may be (but secretly to take pictures under the microscope). That feels like invading someones' privacy, though.

Messages In This Thread

Creating a mini-ura with buffing wheel?
Re: Creating a mini-ura with buffing wheel?
Re: Creating a mini-ura with buffing wheel?
finger pressure...
Side sharpening
Re: Side sharpening
Re: Side sharpening
Ruler trick
in plane iron testing, I found two options..
Re: in plane iron testing, I found two options..
testing high angles..
side comment about planing in general..
I'll demonstrate thick sometime ..
Re: I'll demonstrate thick sometime ..
Re: I'll demonstrate thick sometime ..
Patience ...
I re-read the articles on COE
High benches and low benches
Re: High benches and low benches
This isn't a snarky response, by the way
Others who do ..
Re: Others who do ..
Re: Others who do ..
Re: Others who do ..
Where I am going....
by the way...
I risk offending a lot of people...
Re: Others who do ..
on the last bit...
One other case for effort...
Something precise.
Re: Initially flat
Rotary tool?
Re: Rotary tool?
Some context
Re: Some context
Re: Some context
A failed attempt *PIC*
Re: A failed attempt
Re: A failed attempt
this is a lie nielsen iron?
Stanley iron
Re: Stanley iron
Re: Stanley iron
Re: Stanley iron
Re: Stanley iron
That pretty much covers it...
Success with applying extra pressure near the edge *PIC*
Directed pressure and progressive work
Re: Success with applying extra pressure near the
Wear bevel *PIC*
Visual difference at the back edge of..
Re: Visual difference at the back edge of..
Sorry, I should've been more precise...
Mini-ura on a new Veritas blade *PIC*
Re: Mini-ura on a new Veritas blade
Re: Mini-ura on a new Veritas blade
Re: Mini-ura on a new Veritas blade
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