Re: UV Exposure Source details

Jack,

Boxes, boxes, boxes over the 20 years of printing pt/pd and teaching other
handcoated processes I think that I have build about 20 to 25 UV light boxes.
This is what has worked for me and my students. Small box 20x24 inside, 8/2ft
tubes set 1 in apart inside space needed 17 inches w/ 1 1/2 left on each side.
Space tubes 1 in apart, just enough to get them in and out if necessary. NO, I
say NO reflector behind or in-front of the tubes. I just painted the inside
mat white. I try to use off the shelf stuff 1x8 fur or poplar. The feet for
the box is a 2x3 stud 22 in long laying flat, lamp to print frame distance is
about 5 to 6 inches.

Same spects are used for the 4 ft boxes, just 48 in long. I put a piece of
shop board with holes (peg board) (just remembered the name) for a top to vent
you could put a fan in if you want to cool the inside. Just more wireing to do
and one more hole to cut.

I hope that this helps

Jan Pietrzak

ps I all so use this to expoxe my Solar Plates with

pps buy good balists for the lamps cheep ones just make to much noise
>
> From: jack reisland <reislandj001@hawaii.rr.com>
> Date: 2003/12/18 Thu PM 07:17:42 GMT
> To: alt-photo-process-l@sask.usask.ca
> Subject: UV Exposure Source details
>
> I am in the process of building a fluorescent tube UV exposure unit, but
> would like some advice on a few details. I have found lots of
> information out there already, but some of it is conflicting. One set of
> plans has mylar reflectors behind the tubes, yet a different site says
> that reflectors are a bad idea. The same site has a commercial lighting
> grid between the tubes and the exposure plane for collimation. I also
> find widely varying distances between the tubes and the exposure plane.
> I will not need to access the interior for burning or dodging (I use
> digital negs. and do all manipulations in Photoshop first). So any input
> and advice would be appreciated.
>
> Jack R.
>
>
Received on Thu Dec 18 14:35:46 2003