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 Post subject: Re: Thinning knife
PostPosted: Tue Sep 17, 2013 8:03 pm 

Joined: Wed May 16, 2012 1:49 am
Posts: 316
Location: Amstelveen, The Netherlands
You may ink the part you want to have thinned with a marker to find out which angle is needed to abrade it, and go on till you almost reach the edge. The different scratch patterns should tell you.
I would start at some 1.5cm from the edge.
I use a strip of coarse sandpaper (beginning with P120 or so) on a stone, making edge trailing strokes.


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 Post subject: Re: Thinning knife
PostPosted: Tue Sep 17, 2013 8:13 pm 
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Joined: Wed May 16, 2012 4:42 pm
Posts: 3755
Location: USA... mostly.
NORWAY <> 1c: Refer to answer 4a.

2c: You can, but you run the risk of altering the grind to a flat grind.



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 Post subject: Re: Thinning knife
PostPosted: Wed Sep 18, 2013 8:06 am 

Joined: Tue Mar 05, 2013 1:47 pm
Posts: 74
Location: Oslo Norway
Melampus wrote:NORWAY <> 1c: Refer to answer 4a.

2c: You can, but you run the risk of altering the grind to a flat grind.


So if I want to thin the whole bevel of my Artifex I do need a belt grinder since it is then more easy to make a more convex bevel?
A very coarse stone will not do the trick (Bamboo 150-180#)



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 Post subject: Re: Thinning knife
PostPosted: Wed Sep 18, 2013 4:25 pm 
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Joined: Tue May 01, 2012 10:53 pm
Posts: 335
Location: Seattle, WA USA
I have thinned an Artifex 210 on stones. I used a DMT XXC and the Bamboo 150 for the major work. It did a fine job, but was a lot of work. Granted the one I did on my Kalamazoo machine was MUCH faster in getting done.


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 Post subject: Re: Thinning knife
PostPosted: Wed Sep 18, 2013 7:53 pm 
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NORWAY <> No where did I say it could not be done with stones. As Paradox states obviously, it's easier w/a grinder, but stones do the same thing. To convex on flat stones, you basically grind two angles and then roll them together. On a HanHan stone, the whole grind is a roll. These are obviously advanced sharpening techniques that you most likely aren't going to engage...



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 Post subject: Re: Thinning knife
PostPosted: Thu Sep 19, 2013 6:18 am 

Joined: Tue Mar 05, 2013 1:47 pm
Posts: 74
Location: Oslo Norway
Melampus wrote:NORWAY <> No where did I say it could not be done with stones. As Paradox states obviously, it's easier w/a grinder, but stones do the same thing. To convex on flat stones, you basically grind two angles and then roll them together. On a HanHan stone, the whole grind is a roll. These are obviously advanced sharpening techniques that you most likely aren't going to engage...


Sorry for my misunderstanding. But i have understood that reprofiling my Artifex without a belt grinder probably is to much work by hand:)
But I can still practice on thinning the knife behind the edge.



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