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 Post subject: What DMT for flattening?
PostPosted: Sun Jun 01, 2014 7:54 am 
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Joined: Thu Apr 03, 2014 3:31 pm
Posts: 16
Location: Germany
Hi fellers,

what DMT should I use to flatten all those stones?

    Edge Pro 220 Grit Stone
    Edge Pro 400 Grit Stone
    Chosera 400 Grit Stone (light green)
    Chosera 1,000 Grit Stone (dark green)
    Chosera 3,000 Grit Stone (mauve)
    Chosera 5,000 Grit Stone (gray)
    Chosera 10,000 Grit Stone (light blue)

Can I use the Dia-Sharp Extra Coarse or is it to corse for some and to little corse for others?

Thanks a lot!


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 Post subject: Re: What DMT for flattening?
PostPosted: Sun Jun 01, 2014 9:03 am 

Joined: Thu Aug 16, 2012 10:03 am
Posts: 229
Hi Dforce,

I did a blog post on this: http://moleculepolishing.wordpress.com/ ... terstones/ .

Succes!


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 Post subject: Re: What DMT for flattening?
PostPosted: Sun Jun 01, 2014 11:10 am 
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Joined: Thu Apr 03, 2014 3:31 pm
Posts: 16
Location: Germany
Super helpfull! Thanks a lot.

For documentation purposes: Better use different DMTs. Here is a copy of the ideal setup from the posted website:

400, 600, 800, 1K: Atoma 140
1,500, 2K: Atoma 400
3K, 5K: Atoma 600
8K and above: 1,200 Atoma


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 Post subject: Re: What DMT for flattening?
PostPosted: Tue Jun 03, 2014 2:11 am 
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Posts: 1470
It's helpful to divide the topic into Flattening and Texturizing. If a stone of ANY grit is badly dished, something like the 140 Atoma is ideal - even a 15 or 30k stone.

But once flattened the surface texture of the stone should be appropriate for the task and the above scale is reasonable. I would extend the grit for the Atoma 140 down to the Nubatama 120. While you can flatten the 60 and 24 grit stones with the Atoma 140, the texture will be too smooth and you should 'rough up' the surface to something coarser with a piece of 24 grit Nubatama or a second 24 grit Nubatama.

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Ken



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 Post subject: Re: What DMT for flattening?
PostPosted: Fri Jul 04, 2014 3:59 pm 

Joined: Sun Jun 01, 2014 4:32 pm
Posts: 143
Location: Cape Town , SA
Still waiting for my DMT to arrive to flatten my Shaptons (Atoma being out of stock), and I thought of using sand paper and not sure if this is ideal or a bad mistake?
I also have a ceramic flattening block bought at a woodworking hardware store for flattening water stones, which I've used on the std EP stones with reasonable effect.


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 Post subject: Re: What DMT for flattening?
PostPosted: Sun Jul 06, 2014 7:03 pm 
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Location: USA... mostly.
GEEK <> Using the sandpaper is a bad idea as the potential for contamination is nearly an absolute. Particles of sand off the 50 paper will embed in the 100 stone then leaving errant scratches in your pattern.

{arbitrary grits for example purposes}



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 Post subject: Re: What DMT for flattening?
PostPosted: Thu Jul 24, 2014 3:28 pm 

Joined: Sun Jun 01, 2014 4:32 pm
Posts: 143
Location: Cape Town , SA
Melampus wrote:GEEK <> Using the sandpaper is a bad idea as the potential for contamination is nearly an absolute. Particles of sand off the 50 paper will embed in the 100 stone then leaving errant scratches in your pattern.

{arbitrary grits for example purposes}


Thanks for the tip, you are correct, I had to use the DMT to repair.


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 Post subject: Re: What DMT for flattening?
PostPosted: Sat Aug 02, 2014 4:29 pm 

Joined: Sat Jul 05, 2014 4:06 pm
Posts: 192
I use a DMT coarse for 1000,600, and 400 grit. Extra coarse for 220,120. No problems so far.


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 Post subject: Re: What DMT for flattening?
PostPosted: Sun Aug 03, 2014 1:35 am 
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Joined: Wed Aug 28, 2013 10:09 pm
Posts: 123
I use a DMT coarse for 1k and up, and a DMT XC for anything under that.


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 Post subject: Re: What DMT for flattening?
PostPosted: Wed Aug 20, 2014 6:59 pm 

Joined: Fri May 11, 2012 12:17 am
Posts: 138
I have only ever used DMT extra coarse and works fine for my stones..Just flatten a little more regularly.


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