Re: (ATM) 12 micron woes

Stephen Tonkin (astro@aegis1.demon.co.uk)
Thu, 10 Aug 1995 08:09:39 GMT

In message <950809.191533.EDT.00109366@YSUB.YSU.EDU> Ken Lowther writes:

> pyrex blank kit. Scratches! Backed up, ground them out and tried again.
> Scratches!. Some quite nasty. I think I am goint to skip to the 5 micron
> and see if they reappear. This should tell me if I am just having a problem
> with using the finer grits or if the stuff is contaminated.

I don't know how things are over there, but I have no faith in the grading of the powders I use -- it makes sense to elutriate them.

Clear Skies, Steve <sft@aegis1.demon.co.uk>