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TOPIC: Stock stone/strop progression (Lots of Pics!!)

Re: Stock stone/strop progression 2 years 6 months ago #2024

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I decided to check out plain leather again, first top grain horse butt, moistened with distilled water:

Top-Grain-Horse-Butt---Distilled-Water.jpg


and then top grain horse butt dry:

Top-Grain-Horse-Butt---Dry.jpg


hmmm.....

At least our little sedge (or chicken foot) shaped scratch is getting more shallow.
--Clay Allison
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Re: Stock stone/strop progression 2 years 6 months ago #2025

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At this point, I was unsatisfied with the polish level and decided to drop back down and repeat the following progression: 1 boron carbide> .5 micron chromium oxide> .25 micron diamond> .125 CBN

Eigth-Micron-CBN-Ascending-2nd-Pass.jpg


I didn't photo each step, just worked quickly through the progression to get back to .125 microns. Now we're getting somewhere!
--Clay Allison
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Re: Stock stone/strop progression 2 years 6 months ago #2026

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Here is where things get really interesting - I decided that the bevel was polished sufficiently and we'd be able to examine the scratches from the strops in question, so I began a descending progression, starting with the 3.5 micron diamond and top grain leather strops:

3.5-micron-diamond-paste-descending---top-grain-leather.jpg


Go figure....

The sedge/chicken foot shaped scratch is almost gone.
--Clay Allison
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Re: Stock stone/strop progression 2 years 6 months ago #2027

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Descending yet further to the 5 micron diamond and top grain leather strops, stroking in the opposite direction. Note what has happened to our little sedge shaped scratch:

5-Micron-Diamond-Paste-Descending---Top-Grain-Leather.jpg
--Clay Allison
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Re: Stock stone/strop progression 2 years 6 months ago #2028

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On to the 10 micron diamond and top grain leather strops. We've lost our sedge/chicken foot scratch but we now have an odd little hole for reference:

10-Micron-Diamond-Paste-Descending---Top-Grain-Leather.jpg


Still alternating strokes so we can see the new scratches clearly.
--Clay Allison
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Re: Stock stone/strop progression 2 years 6 months ago #2029

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Finally the 14 micron diamond and top grain leather strops:

14-Micron-Diamond-Paste-Descending---Top-Grain-Leather.jpg


Still switching stroke directions.
--Clay Allison
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Re: Stock stone/strop progression 2 years 6 months ago #2030

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Climbing back up the ladder, switching stroke direction on each grit:

10 micron diamond and top grain leather strops -

10-Micron-Diamond-Paste-Ascending---Top-Grain-Leather.jpg


5 micron diamond and top grain leather strops -

5-Micron-Diamond-Paste-Ascending---Top-Grain-Leather.jpg


3.5 micron diamond and top grain leather strops -

3.5-micron-diamond-paste-ascending---top-grain-leather.jpg


So far so good. More to come.
--Clay Allison
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Re: Stock stone/strop progression 2 years 6 months ago #2031

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Now it gets weird again:

1 micron diamond and top grain leather strops (Wicked Edge paste)-

1-Diamond-Paste-Ascending---Top-Grain-Leather.jpg


This looks good. Onto the next - .5 micron and top grain leather strops (Hand American spray)-

5-micron-diamond-paste-descending---top-grain-leather_2012-03-13.jpg


weird?!? And the next - .25 micron diamond and split grain leather strops (Hand American spray)-

25-micron-diamond-paste-descending---split-grain-leather.jpg


weirder still. Next are the .125 micron CBN and split grain leather strops (Precise Sharpening spray)-

125-micron-CBN---split-grain-leather.jpg
--Clay Allison
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Re: Stock stone/strop progression 2 years 6 months ago #2032

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Contamination? Maybe something to do with the split grain leather.... My guess is that the top grain leather really does move the metal around the surface and the leather is doing most of the work. With the split grain leather, the diamonds are doing more work than the leather. Lots more testing to be done here!
--Clay Allison
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Re: Stock stone/strop progression 2 years 6 months ago #2033

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I decided to go back to the 1 micron diamond paste and top grain leather strops since that was where I had my last, best result:

1-Diamond-Paste-Ascending-2nd-Pass--Top-Grain-Leather.jpg


It was a worthwhile move, the bevel cleaned right up again.
--Clay Allison
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