PDA

View Full Version : Tanning bed for alt process????



seraphim
07-08-2008, 09:24 AM
I was just given a klafsun tanning bed a rather portable model built in 1985 it has 9 flo bulbs 40 watt in it adjuustable hiegth cooling fans platform on the floor with wheels also a 30 min timer ..timer is adjustable...I figured this'd be a perfect way to expose van dyke prints ....btw I am new to alt printing



what do you all think??? picture to follow soon

murrayatuptowngallery
07-08-2008, 06:27 PM
Are they 4'/48" T12 lamps?

Can you tell me any identifying numbers on them?

The various alt-processes have varying spectral sensitivity. Some really need UV, some do fine with the deep blue end of the spectrum or UV.

I imagine they are optimized UV-A, so that makes the above comment moot, but perhaps interesting to someone who has an abundance of other lamps like marine fish tank blue lamps.

I never considered seeking out a tanning bed specifically for alt-process as practical, but since that problem is solved in your case, I'm pretty sure it will work well. There is an alt-process listserv mailing list through the University of Saskatchewan (I'm not Canadian, apologies if mispelled). You may find Google references to a usask alt-process list. It is so active, I eventually unsubscribe myself...I can't keep up with the volume of mail (I have 150 unread messages from it at present). A worthwhile resource...

Does it have interlocks or something that only allows it to be 'lit' when closed? You may need it further away from print materials than from your "Mom" tattoo, and might need to make accommodations for using the unit open or electro-mechanically separated into top and bottom.

seraphim
07-08-2008, 10:24 PM
as per the manual equipted with 9 low pressure uv-a lamps rated 40 watt with an integrated special reflector r-uva lamp.... radiaton area is appx 24" x 16"

I figured I'd attatch the graflok timer on it to set the exposure time but I think this just might be over kill...then again it was for free so...I am gonna try it out give me a few weeks cuz I have a show August 1st and I need 10 more prints and I need to print and frame them also decide what shots to use and finish the darkroom being setup.......yeah things are lively....I just scored a revolving darkroom door for $50 and a saunders 4x5 color enlargerfor 100 which came with extras I gotta slow down when it rains ...it pours

heyoka
07-10-2008, 02:01 PM
I use a little Phillips facial tanning machine for my pt/pd prints, and it works a treat, though it only covers up to 8x10. I just drape a cloth over it during exposures to prevent too much stray UV around the place. I put a couple of hardback books, or two video cases on top of the edges of the frame to get a little more height than popping it straight down. it's not wildly powered, but pt/pd prints run from about 2 to 6 minutes each to expose.

Anything larger, I just use daylight. Get into the sun or into the shade, depending on the contrast of the negative (if you have a very contrasty neg, bright direct sun will even things out a bit.)

seraphim
07-31-2008, 01:06 AM
this is the machine

Attached files http://f295.f295.org/uploads/img_5474_web_9741.jpg (http://f295.f295.org/uploads/img_5474_web_9741.jpg)

seraphim
07-31-2008, 01:07 AM
and the bulb a 5x7 print was about 2-3 minutes

Attached files http://f295.f295.org/uploads/img_5476_web_6998.jpg (http://f295.f295.org/uploads/img_5476_web_6998.jpg)

murrayatuptowngallery
07-31-2008, 11:06 AM
I can't read the lamps, but if you know how long it takes, you're good.

I did find an interesting reference on the different regions of the UV spectrum for sunlamp use, that might be of interest to someone. Also, the company, Voltarc, I believe is affiliated with the enlarger cold lamp people (Aristo?)

http://www.voltarc.com/images/Tanning%20User%20Sheets/PWR%20Magazine%20Articles/1a%20Looking%20Fit_Search%20for%20lamp_%20Nov2004. pdf

seraphim
07-31-2008, 11:43 AM
well I really don't I was following B&S directions...when it turns the chocolate brown it's kinda done????

Attached files http://f295.f295.org/uploads/img_5476_web_7965.jpg (http://f295.f295.org/uploads/img_5476_web_7965.jpg)

murrayatuptowngallery
07-31-2008, 08:27 PM
I guess if you got results or are close, you know what you're doing!

Good luck...