[pure-silver] Re: B&W Positive from B&W Negative.
----- Original Message ----- From: "Jim Brick" <jim@xxxxxxxxx> 
To: <pure-silver@xxxxxxxxxxxxx>
Sent: Tuesday, June 26, 2007 5:43 PM
Subject: [pure-silver] Re: B&W Positive from B&W Negative.



At 11:27 PM 6/26/2007 +0000, Speedy . wrote:
Apparently this guy has negatives that he wants to make positive images of for projection.
Back when I was a commercial photographer, I made lantern slides for several professors here at a local school... Stanford, and other local schools as well. They needed to project images that were taken on B&W film. Back then, lantern slides and projectors were commonplace. It was very easy to print onto and process lantern slides. 

Jim
Lantern slides had emulsions very similar to the release positive film I mentioned. All manufacturers used to make lantern slide plates. Also, Release Positive was available in sheet form which could be used to make lantern slides as well as direct view (light box) transparencies. AFAIK, none of these materials are currently made except for Release Positive which is often used for making matts and masks for special effects work. 3x4 lantern slides are very impressive and those in color spectacular. There is as much difference between them and a 35mm slide as there is in prints from large-format and 35mm. 2-1/4 x 2-1/4 slides are still possible and have much the same quality as the larger ones. One can still find lantern slide projectors on the used market. I think they are still in the catagory of obsolete and cheap rather than expensive collector's items. When I was a kid every school had one, usally either Bausch & Lomb or American Optical. large size transparencies were also widely used in television, mostly as diapositives for background projection. I have a few of these from KTTV here in L.A. including a couple I remember seeing on the air when I was in my early teens. 

---
Richard Knoppow
Los Angeles, CA, USA
dickburk@xxxxxxxxxxxxx 
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