Mark,

I was indeed talking about the slides that are produced by placing the image
on one piece of glass and then covering it with another.  I appreciate the
information and input.

Becca Hiller
Museum Curator
Santa Fe Trail Center
R.R. 3 Box 137
Larned, KS 67550
(620) 285-2054
----- Original Message ----- 
From: "Mark Janzen" <[log in to unmask]>
To: <[log in to unmask]>
Sent: Wednesday, March 08, 2006 3:31 PM
Subject: Re: Glass Slides


>
> Hi Becca,
>
> Are we talking about the type of slides that have an image between two
> relatively thin pieces of glass, where the image itself is actually on one
> of the pieces of glass and not simply sandwiched in between? They are
> typically wrapped around the edges with a black paper tape, and often
> labelled on one side. Hand touching and coloring are common.
>
> If so, you do not need to worry about a scan or two. The surface should be
> well protected from harm, and scanning such an image will not unduly
damage
> it in terms of light exposure. Your scanner light is bright, but the
> duration is low, and you will not do any appreciable damage in those few
> seconds. The scanner does not get hot, so that should also not be an
issue.
>
> The only really certain way to determine the emulsion type is to
> disassemble them and test them, which should only be done by a
conservator.
> According to my info, you are most likely dealing with gelatin dry plate
> images, which were common in the late 1800's. You are right however, that
> there are other possible types.
>
> I would suggest scanning them into a high resolution(1200DPI +) and
> archiving them in .tiff format. The images will be large, but the quality
> will allow you to do whatever you want with the images in the future,
> including changing the format and shrinking them to an appropriate size.
>
> Good luck.
>
> Mark Janzen
> Registrar/Collections Manager
> Edwin A. Ulrich Museum of Art
> Martin H. Bush Outdoor Sculpture Collection
> Wichita State University
> (316)978-5850
>
>
>
>              Santa Fe Trail
>              Center
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>              SE.LSOFT.COM>             Glass Slides
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>              03/08/2006 03:08
>              PM
>
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>
>
>
> We have a wonderful collection (approximately 2300) Glass Magic Lantern
> Slides that were taken by a local resident 'Comrade Smith' in the mid to
> late 1800's.  There are both black & white and color slides. We are
> considering a project which would require scanning the slides with a
> scanner that has the adapter you place on it and the slide is lit from the
> back.
>
> My concern is how this will effect the slides.  I have gone through the
> information we have on the slides and there is no information on the
> process Smith used.  I know that there is the Albumen process, and others
> that used silver bromo-chloride or chloro-bromide silver gelatine
> emulsions.
>
> Does anyone know what effect scanning them could have?  Also, is there any
> tell-tell signs we can look for that would give us a hint to what process
> he used?
>
> Any help you give is greatly appreciated.
>
> Becca Hiller
> Museum Curator
> Santa Fe Trail Center
> R.R. 3 Box 137
> Larned, KS 67550
> (620) 285-2054
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