[LargeFormat] Ground glass or etched

Tue Dec 24 14:58:01 2002

I made some with valve grind compond.  wet the glass and squeeze the tube
and use another one to work against the other glass.  So really you will
have two for the work of one.

lee\c
----- Original Message -----
From: "philip.lambert" <philip.lambert@ntlworld.com>
To: <largeformat@f32.net>
Sent: Tuesday, December 24, 2002 1:22 PM
Subject: Re: [LargeFormat] Ground glass or etched

> 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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> >
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