[pure-silver] Re: photo paper in camera?
- From: Margaret H Albertine <salbert@xxxxxxx>
- To: "pure-silver@xxxxxxxxxxxxx" <pure-silver@xxxxxxxxxxxxx>
- Date: Wed, 1 Mar 2017 15:38:23 +0000
Thank you, Nicholas.
-----Original Message-----
From: pure-silver-bounce@xxxxxxxxxxxxx
[mailto:pure-silver-bounce@xxxxxxxxxxxxx] On Behalf Of Nicholas O. Lindan
Sent: Wednesday, March 01, 2017 8:19 AM
To: pure-silver@xxxxxxxxxxxxx
Subject: [pure-silver] Re: photo paper in camera?
"Margaret H Albertine" <salbert@xxxxxxx> wrote:
I use photographic paper in homemade pinhole cameras. Can anyone
explain why it turns colors?
I'm not entirely sure what's going on - if these are _very_ long exposures then
you may be turning the paper dark by the action of sunlight alone. This will
result in color due to the colloidal silver that is produced by the light
exposure.
These are called 'lumen prints' when made by contacting something - often a
flower -in a half hour of full sunlight.
The color can be somewhat preserved with the stabilizer solution used in color
photography followed by fixing. If you try to fix the print normally then the
image disappears.
Google for < chromoskedaisic >.
--
Nicholas O. Lindan
Darkroom Automation
Cleveland Engineering Design, LLC
Cleveland, Ohio 44121
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