[pure-silver] Re: Test Negatives
- From: "Frank Filippone" <red735i@xxxxxxxxxxxxx>
- To: <pure-silver@xxxxxxxxxxxxx>
- Date: Thu, 24 Nov 2005 10:02:41 -0800
Test NegativesRalph.. I bought a mask made for semiconductor manufacturing.
It is an old item, so of no commercial importance. The lines are etched on
with accuracy to 5 microns. It is a B+W Mask only of a geometric pattern.
It works quite well if you are only interested in alignment. The mask is so
accurate, that any error is in your setup. You can examine the projected
image on the baseboard or make prints and check them out.
It is thin glass, about 6 inches square...
I got it from
http://www.goldmine-elec.com
The item I have is about 10 years old, but they still have them in
stock......
http://www.goldmine-elec-products.com/prodinfo.asp?number=G14259&variation=&;
aitem=2&mitem=2
BTW, they claimn the masks are .5 inches thick.. no way.... they should be
around 0.100 inches thick or thinner.....
It may or may not do what yo want, but it is only $12.......!
Frank Filippone
red735i@xxxxxxxxxxxxx
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