Old contact printer as a UV light box

Discussion in 'Alternative Processes' started by oldglass, Jun 30, 2011.

  1. oldglass

    oldglass Member

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    Hi,
    If I get one of these:
    [​IMG]

    And swap the bulbs with this:
    [​IMG]

    Can I use that to create 5x7 to 8x10 alternative process prints?
    If you don't think so, please educate me as to why.

    Thank you in advance.
     
  2. heespharm

    heespharm Member

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    I guess you can try... Some concerns... Does the glass transmit uv light? Is it even lighting? Print time may be long...???
     
  3. heespharm

    heespharm Member

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    On a second note I've seen a scanner gutted and uv lights were put in and seemed to work fine
     
  4. Jim Noel

    Jim Noel Member

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    After building a few UV boxes and seeing more built by others, I am surprised at how well some rather odd configurations work. A few years ago an experiment was carried out by a respected alt photo worker where she place a strip of black tape on every other tube in a fluorescent box. The paper was laid directly on the tubes and there was no banding.

    All this to say, I see no reason your idea won't work. Give it a try.
     
  5. holmburgers

    holmburgers Member

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    I use two of those bulbs for making dye-imbibition matrices (which have no pigment in them, just dichromated gelatin) and my exposures are in the 50 minute ballpark. Also, they are susceptible to voltage fluctuations & consequent spectral changes.

    Something to keep in mind, that's all.
     
  6. jon

    jon Member

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    I have an old "photocrat" contact printer very similar to the one in your shot. I've got a CFL UV bulb in it and it works great for contact printing 4x5 prints. Check my gallery for "under the bridge", its an argyrotype I made on it. You should be fine.
     
  7. jnanian

    jnanian Advertiser Advertiser

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    i have a printer just like that
    and i got cf bulbs ( you have to get the right ones )
    and it works fine ... the images are nice and small :smile:

    be careful, the light leaks out of the top when it is down
    and the unit is ON ...
     
  8. michaelbsc

    michaelbsc Member

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    What are your exposure times?
     
  9. wildbillbugman

    wildbillbugman Member

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    Hi,
    I think it depends on the process. I have found that these lights work well for dichromate sensitized systems,like gum/dichromate. On the otherhand, so called black lights are useless for ferric oxalate senitization, as in Pt/Pd printing.
    Bill
     
  10. Sowers

    Sowers Member

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    I built a UV box that uses 6 of those CFL blacklights. 10 minute exposures for my kallitypes and I couldn't be happier.
     
  11. Renato Tonelli

    Renato Tonelli Subscriber

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    I have a similar one (made by Time-o-Lite) which I was planning to modify for Alt. Processes. please keep us posted on how it works out for you.
     
  12. Darto

    Darto Member

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    Hi, all, first post!

    I am wondering what is the correct bulb to buy (curly CFL blacklight) to buy in order to use alternate process printing in a standard contact printer like this (I have a large contact printer already). Thanks.
     
  13. holmburgers

    holmburgers Member

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  14. Cruzingoose

    Cruzingoose Member

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    Last edited by a moderator: Oct 24, 2011
  15. Darto

    Darto Member

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    Thanks, my contact printer has three E26 (standard) bases. Rated two x25 watt exposure bulbs + one 7-1/2 red safelight 57-1/2 watt total max. I think two of those small FEIT 15 watt CFL will fit, pretty sure!