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

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.
----- Original Message ----- From: "BOB KISS" <bobkiss@caribsurf.com>
To: <alt-photo-process-l@usask.ca>
Sent: Sunday, July 27, 2008 7:25 AM
Subject: RE: Lighting for Platinum/palladium Alt proc Work Area

Do NOT coat under fluorescent lighting.  They emit UV and most
"sages" say that they can cause fog in UV sensitive processes.
Most say that dim tungsten is fine but I also take the extra
precaution of coating under yellow "bug bulbs".

-----Original Message-----
From: dhowk [mailto:dhowk@comcast.net]
Sent: Sunday, July 27, 2008 5:19 AM
To: alt-photo-process-l@usask.ca
Subject: Re: Lighting for Platium/palladium Alt proc Work Area

I use 25 watt yellow bug-lite bulbs in both dry and wet areas when
working on alt process prints.

On Jul 27, 2008, at 1:33 AM, Jon Reid wrote:

Thta's true Brian,

I coat under a tungsten filament lamp (normal bulb), not tungsten
halogen or similar (I'm not sure about them). I also have coated
under flourescent lamps.


On 27/07/2008, at 1:28 PM, Brian Casey wrote:

I am in the process of setting up a work area for alt proc
coating and printing.I understand that I could use tungsten light
without causing any problems (fogging et al.) to the associated
emulsions.  Is that true?
Thanks in advance
Brian Casey

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