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  Photography Forum: Darkroom Techniques Forum: 
  Q. Contact Printing - Why B&W paper turned black...

Asked by Elangovan S    (K=10675) on 8/10/2004 
Hi Yall...

New to darkroom and processing stuff...

I was trying to contact print using
- Arista RC Plus pearl Grade 3 Paper.
- 120 film
- 25w house hold G type bulb held about 2 feet above the glass plate. Paper and negatives were set inside a frame - emulsion to emulsion.
- Arista Paper developer
- Arista Stop bath
- Arista Fixer

I shut down the lights in the bath room and opened the paper cover and set it up inside the photo frame emulsion (shiny) side facing up and arranged the negatives emulsion facing the paper, set the glass over the negative. Set the timer for 8 sec and switched on the light (25w bulb). Switch of the light. After that I kept the paper into the developer. Now switch on the 25w light again and was 5ft away from the processing area.

While developing the paper, it turned completely black. I m puzzled...

Please help me, what am I doing wrong?

Thanks in advance.
Elangs.



    



 Peter Witkop   (K=3189) - Comment Date 8/11/2004
Having the 25w bulb on while developing fogged the paper. Moving the light from 2 to 5 feet from the paper only cuts the light about 2 2/3 stops; a signifigant change in an exposure, still more than enough to fogg the paper. You need to either get a safe light to work with until the paper is fixed, or you could work in total darkness until the paper has been in the fix for about a min. or so (like one does developing sheet film on trays).

Peter




Phillip Cohen
 Phillip Cohen  Donor  (K=10561) - Comment Date 8/11/2004
Also 8 seconds with a 25 watt lamp seems to be a bit much, I remember contact printing with one of those little 7.5 watt light bulbs and that was on slow AZO paper, not normal enlarging paper which is much faster. Try getting a lower wattage bulb and try that.

For sure you will need a safelight. Either red (1A filter) or amber (OC filter) if you use an old kodak bullet, or get something like a Patterson plastic safelight, just make sure it is at least 5 feet from your trays and exposure frame. Even though it is a safelight if it is too close or bright it will still fog your paper.

Phil





 Elangovan S   (K=10675) - Comment Date 8/11/2004
Thanks Peter and Phillip. Will try cut down the exposure (both the intensity of the light and timing). I m planning to do a test sheet (by exposing part of the paper and such... let me see how this goes.

Thanks again.
Elangs.





 Elangovan S   (K=10675) - Comment Date 8/11/2004
Phillip, I dont have proper safelight. Can I use the red/orange colored party light as safelight?

Elangs.




Phillip Cohen
 Phillip Cohen  Donor  (K=10561) - Comment Date 8/11/2004
You can probably use one of those little red bulbs, just keep it as far away as possible from where the paper is located. Hopefully you have not already fogged the paper in the package. I would use the red one instead of the yellow as it is probably safer.

Phil





 ann clancy   (K=2014) - Comment Date 8/12/2004
You could try, but i would advise using the standard darkroom safe light. The old fashion bullet type are cheap.







 Elangovan S   (K=10675) - Comment Date 8/15/2004
Ann, I checked the local photography stores here. They had a couple models and at $50... Hmmm... its still expensive for me... Well... Let me try the blind way for some time.

Elangs.





 Elangovan S   (K=10675) - Comment Date 8/15/2004
Thanks a lot guys. I have tried the contact printing again today. W/o Safelight and in complete dark... I got the print! Before doing that I did a test strip to find the exposure time with my room light (same 25w light but with a diffuser to reduce the intesity). wow... it was a big project for me. at the end one happy guy!

Appreciate all the help. Thanks again.
Elangs.




Matej Maceas
 Matej Maceas  Donor  (K=24381) - Comment Date 8/15/2004
I hope you'll post the result!





 ann clancy   (K=2014) - Comment Date 8/15/2004
Gosh, $50 dollars, try used. What part of the world are you in? If you check out Freestyle in Cal. they have one type for about 26 dollars and that is a higher end one than i am suggesting.





 Elangovan S   (K=10675) - Comment Date 8/17/2004
Posted a image in my portfolio, Matej. Thanks a lot for all your motivation.

Elangs.





 Scott McFadden   (K=5663) - Comment Date 8/23/2004
For a cheaper safelight try using red glass paint
at the base of the party light to seal it safe.
Though the red proper ones can be had very cheap and they fit into a normal socket.
There are the more expensive housed jobs and probably the ones youve seen.





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