[pure-silver] Re: Light Leaks with Large Format
- From: DarkroomMagic <info@xxxxxxxxxxxxxxxx>
- To: PureSilverNew <pure-silver@xxxxxxxxxxxxx>
- Date: Mon, 28 Nov 2005 19:44:04 +0100
I forgot to mention it. A repair is out of the question anyway. The pinholes
are at the bottom of every fold! It's beyond my comprehension that this is
not fogging any film. I made a test: one side of the holder exposed in
camera to pinhole light only for 10 minutes under two 40-Watt fluorescent
bulbs; the other side not exposed at all. The two developed film sheets show
or measure no difference. Pinholes, even in quantity. seem to have little or
no effect. It's probably like hundreds of f/32,768 exposures.
Regards
Ralph W. Lambrecht
http://www.darkroomagic.com
On 2005-11-28 18:29, "Howard Efner" <hfefner@xxxxxxxxxxxxx> wrote:
> Ralph, pinholes in the bellows can be a real problem! The ideal
> solution is to replace the bellows, but a repair will save some cash
> and extend the life of the bellows. One way to take care of
> pinholes, and also to repair big holes etc, is to get some black
> rubber roofing primer ( Snow Roofing Systems Elastoseal - Home Depot)
> and paint the inside of the bellows to seal the leaks. Use a foam
> brush! A conventional brush will develop little crumbs of rubber
> that will come off and stick to the cloth. Let the camera thoroughly
> dry with the bellows extended ( several days to a week or so
> depending on humidity) so that the bellows do not glue themselves
> together. If still tacky, lightly dust with some talcum powder and
> vacuum out the excess or give a thin coating of the black rubber finish coat.
>
> The Elastoseal is a water based neoprene emulsion that drys to a
> flexible rubber film. Also good for waterproofing darkroom
> sinks. They also make a white and black top coats that work in
> darkroom sinks.
>
>
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