U of S | Mailing List Archive | alt-photo-process-l | Re: Lighting for Platinum/palladium Alt proc Work Area

Re: Lighting for Platinum/palladium Alt proc Work Area


You can place colored mylar over your lightbox to filter the light so you don't have to worry about fogging while registering your negatives.

Best Wishes,

Mark Nelson

On Jul 27, 2008, at 8:51:32 AM, "Christina Z. Anderson" <zphoto@montana.net> wrote:
Hi Brian,
I coat under full on tungsten light (probably a 100 watt bulb in the ceiling 
fixture) for cyanotype, gum, platinum. I **dry** prints, though, in a 
closet and generally turn the light off when leaving the room to let the 
prints dry. BUT I generally do not do this with either Van Dyke Brown or 
Salt as both are more prone to fogging and are silver processes. So it 
depends on what your process of choice is. I used to use yellow bug lights 
but found this very difficult with some processes including yellow 
dichromate, and when I found out that Laura Gilpin of historic fame coated 
her pt/pd prints in daylight I thought what the heck.

I also eyeball register over a light box that has fluorescent tubes in it 
with nary a problem, but the light from that has to go through thick plastic 
and the back of the paper to fog a print and it isn't on the lightbox long 
enough to matter.

You could always do a test: keep a coated print out, and cover all but a 
strip with a black photo bag. Every 5 minutes move it an inch. Develop and 
see if you have stripes.

With many processes that take long exposures it just isn't a problem.