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02-25-2020, 05:15 PM #1
It is a good product, the red paste is medium fine and black is fine.
It is made by Herold, who also make strops.
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Montgomery (02-25-2020)
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02-25-2020, 07:44 PM #2
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02-25-2020, 07:56 PM #3
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Thanked: 13234The stats that they gave years ago, yes they work fine with a hanging leather strop as long as you do your job
I have found these to be very well matched to the older softer Sheffield steels
Green 5-8 micron
Red 3-5 micron
Black 1-3 micron
Soligen pastes are a much more mild cutter then say a diamond paste of the same micron size..."No amount of money spent on a Stone can ever replace the value of the time it takes learning to use it properly"
Very Respectfully - Glen
Proprietor - GemStar Custom Razors Honing/Restores/Regrinds Website
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Montgomery (02-25-2020)
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03-02-2020, 01:34 PM #4
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Thanked: 19Many thanks!
A general question: I have seen in various sources that the cutting particles in a 4000 grit stone are 4-5 microns (eg https://en.wikipedia.org/wiki/Sharpening_stone). I have also seen chromium oxide powder and red ferric oxide powder advertised with particle sizes of 0.5 and 0.3 micron respectively (eg https://www.ebay.co.uk/itm/264631273241).
I know there is much more to abrasive quality that the size of the cutting particle, but how do I square these numbers with the particle size in the list above for the Herold pastes?
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03-02-2020, 04:48 PM #5
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Thanked: 3215So, there is grit (partial) size and there is finish quality. A lot depends on the grit, is it friable, (will it break down further), how deep will it cut, (partial shape) and the substrate, (does the grit imbed into the substrate, leather vs wood). All affect the ability to “Polish”.
Take Arks and Jnats, some say all Ark grit and Jnat grit respectively are the same and the difference is in the concentration and binder.
Bottom line, it is not just about grit size. Add to all that steel, substrate hanging vs paddle and technique, are why paste works for some and not for others, your mileage may vary.
Here are photos from an old post on the effects of pressure, (just one variable)
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Montgomery (03-03-2020)
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03-02-2020, 05:07 PM #6
I use those postes on my SRD modular paddle strop and am very happy with the results
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Montgomery (03-03-2020)
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03-03-2020, 11:30 AM #7
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Thanked: 19After the advice, I got some of the Herold hard strop pastes, and pasted up one of the cotton webbing strops:
First impressions are that the black paste is where it's at. The red seems a bit like the green (pre-loaded on my Herold loom strop) in quality, just finer. The black seems to be really smooth, and though I need a few more laps, it really seems to add keenness to the edge. Anyway, I will experiment, and get to know these compounds.
For anyone wanting to experiment with stropping, I have definitely found this suggestion very useful. You can put anything on a piece of card and try it. I just tried tailor's chalk:
(for anyone interested, the tailor's chalk left very fine scratches in the bevel, which polished out quickly with stropping on plain fabric; it could definitely be used for stropping, and I'd suggest it could be used to refresh a slightly dulled edge. I'm not going to use it regularly, because it doesn't really add anything new to the toolkit)
Many thanks!
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JP5 (03-05-2020)