Re: [ATM] re: Wax and Pitch

[Ken Lowther <hermit@outofoptions.org>]

Well, those afflicted with cabin fever have lost something to kick 
about, but the rest of us thank you.  To me, counter intuitive until I 
realize soft and flow are two different properties.  I guess.  ;)

Ken

Quoting Bill Marriott <bmarriott@pacbell.net>:

> Hello, again....
>
> Well, even though this subject has been beat to no end, I thought I 
> would comment anyway, since this is a subject of relence this week 
> here in my optical shop.
>
> I am in the process of making a bees wax lap, for polishing of Cesium 
> Iodine, duplicating a process developed by an engineer at Lawrence 
> Livermore National Lab.   He reccomended me cutting the polishing 
> surface with a flycutter in a mill, as "wax does not flow like pitch"
> My comment was we will see, so I made a traditional lap, and have 
> been trying for a couple of days to get it to press out against a 
> flat piece of glass.  I'll get the reference flat hot, the wax lap 
> has been hot water heated, and some of the lap will come in, but most 
> will not. I've warmed everything, but a big pile of weights on top, 
> let it sit for several days, and still not full contact.
>
> Today I am setting up a flycutter in one of my verticale mills, and 
> will try cutting the surface flat.
>
> A pitch lap being used for a cc surface, is convex, and if left 
> sitting for a few days shows lack of contact inthe center, where the 
> pitch hill and slowly flattened, due to gravity and the flowing 
> nature of pitch.
>
> Just one reporters opinion.
>
> Bill Marriott
> VA Optical Labs
> http://starlightoptical.com
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> ATM mailing list http://www.atmlist.net/
>

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