From: Robert W. Schramm (schrammrus@hotmail.com)
Date: 04/22/02-05:34:54 PM Z
Richard,
Yes, I am aware of that but also I know of a local amateur astronomer who
made a mirror grinding machine which he used down to the last carborundum
grit and then finished by hand.
Bob Schramm
>From: "Richard M. Koolish" <koolish@bbn.com>
>Reply-To: alt-photo-process-l@sask.usask.ca
>To: alt-photo-process-l@sask.usask.ca
>Subject: Re: To preserve a daguerreotype. Questions
>Date: Mon, 22 Apr 2002 09:37:34 -0400 (EDT)
>
> > I do my initial polish with a wheel. Even though it is a special
>jeweler's
> > wheel with special bearings and other things to reduce vibration to
>almost
> > nothing, I still must do the final buffing by hand with two buffs. I
>cannot
> > explain in words how to polish a dag plate. One must be shown by an
> > experienced daguerreotypist. A poorly polished plate not only gives a
>poor
> > image but is not as sensitive as a properly polished one. I have read
> > somewhere that the early daguerreotypists had machine powered leather
>buffs.
> > Perhaps something could be devised but I do not know how well they would
> > work. During my training I was taught how and where to place my hands
>during
> > buffing and how to get an even polish. Also how to know when the plate
>is
> > correctly polished. It struck me as being similar to mirror grinding for
> > astronomical telescope mirror when the final stage is also done by hand.
> >
> > Bob Schramm
>
>
> Optics (telescope mirrors, lenses, etc) are traditionally polished
>with a
> pitch lap and rouge. Amateurs often make small mirrors completely by
>hand,
> including the rough grinding.
Check out my web page at:
also look at:
http://www.wlsc.wvnet.edu/www/pubrel/photo.html
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