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Hi Olivier,<br>
<br>
I've made a few ground glasses using thin windowpane glass, as
colorless as I could find. I also had a 4x4x3/8" piece of glass cut,
the edges smoothed, and I used this as my grinding stone. <br>
<br>
I ordered 2# (minimum order) each of 10 Regular, 30 Regular, and 50
Regular lapidary powder from this company:<br>
Universal Photonics (<a class="moz-txt-link-abbreviated" href="http://www.universalphotonics.com">www.universalphotonics.com</a>)<br>
295 West John Street<br>
Hicksville, NY 11801<br>
800-645-7173<br>
<br>
The first pass with the #10 powder will cut the glass down to the low
spots. If you see clear glass, you have a low spot and need to regrind.<br>
The second pass with the #30 powder simply refines the cut.<br>
The third pass with the #50 powder will give it the optical clarity to
use it for focusing. I did this for my CP16R, and it did a great job.<br>
<br>
Glass will work a lot better than acrylic, as it will leave you with a
much finer grind pattern. Acrylic is a lot softer and will provide a
less distinct image.<br>
<br>
-Brandt<br>
<br>
<br>
olivier auverlau wrote:
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<div><font face="Arial" size="2">Hi guys , i need grounding acrylic
to make Groundglass .... </font></div>
<div><font face="Arial" size="2">I will use optical acrylic from
Filter 4x4 .... </font></div>
<div><font face="Arial" size="2">I have tryed the same method i use
with glass (Aluminium oxide) .... but don t work so good ....</font></div>
<div><font face="Arial" size="2">i obtain a very good but too "thin"
grounding .... </font></div>
<div> </div>
<div><font face="Arial" size="2">so i have tryed with #1500 sand
paper ..... same result .... very fine but too thin ....</font></div>
<div> </div>
<div><font face="Arial" size="2">ANY OTHER IDEA ???? i never find the
"adhesive" ground glass very precise ..... Any idea ????</font></div>
<div> </div>
<div><font face="Arial" size="2">Thnaks a lot, Olivier . </font></div>
<div> </div>
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