[LargeFormat] Ground glass or etched

[philip.lambert]

I will search on lapidary suppliers in the UK and see what turns up. Thanks
a lot. Philip
----- Original Message -----
From: "Philip J. McCourt" <pjmccourt@ameritech.net>
To: <largeformat@f32.net>
Sent: Tuesday, December 24, 2002 2:06 PM
Subject: Re: [LargeFormat] Ground glass or etched


> Philip,
> Why not just make your own? I have made a few of them now and they have
> turned out very nice. The powder that I use is simply 600 grit.  Making
> a ground glass should take about 20 minutes of your time. I simply buy a
> cheap picture frame for  the glass.  The quality of the finished product
> will amaze you, the image is bright enough to see in daylight without a
> dark cloth.
>
> The powder can be found at lapidary supply stores. (rock polishing
> compound)  I have talked to people that have used fine rubbing compound
> used for rubbing out auto finishes.  The stuff I use is a 600 grit
> aluminum oxide. Just put a little bit of powder and a tiny bit of water
> between 2 pieces of glass and start moving the glass in a circular
> motion for about ten minutes. Wash it off and then check to see if the
> glass is done yet. This method will give a very fine surface for the
> image and is a joy to use and focus the camera. Also it is cheap enough
> to carry a spare with you in your kit.
>
> I have used acid etched glass and sandblasted glass and this homemade
> glass is by far the best yet.
>
> If there is enough interest I will put together a "how to" page on my
> web site for making ground glass.
> http://www.philsan.com
>
> Philip McCourt
>
> philip.lambert wrote:
>
> >I am having difficulty getting a replacement focussing screen in the UK
for
> >a Speed Graphic and a Century Graphic. Mr Cad has kindly offered to sell
me
> >an old screen to cut down but old glass is brittle and tricky to cut,
even
> >though it involves only straight line cuts here.  The alternative is to
> >import a Boss screen which would work nicely when eventually received but
> >glass is cheaper, when you can get it. The only possibility I have heard
of
> >is 2mm sandblasted, an example of which looked very white and I can
imagine
> >how dim an image would result.
> > Does anybody know a source of new glass in the UK?   Thanks a lot.
Philip
> >
> >
> >
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