I've done a lot of coating with PT/PD under a 40 watt incandescent lightbulb. I've yet to notice any problems. The bulb is about 6 feet from my coating station. I dry my coated paper in the dark. I don't like yellow bug lights because you can't see what you are doing when coating—the solution is yellow too!
On Jul 27, 2008, at 7:25:14 AM, "BOB KISS" <bobkiss@caribsurf.com> wrote:
DEAR BRIAN,
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".
CHEERS!
BOB