Suitable Light for Pt

Discussion in 'Alternative Processes' started by Annie, Nov 26, 2003.

  1. Annie

    Annie Member

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  2. sanking

    sanking Restricted Access

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    Annie,

    Briefly, it would not be suitable. Certainly, not optimal. This light would be far from ideal. Pt/Pd is most sensitive to wavelengths below 400nm, and this light radiates very little in that range. It might expose the the paper because of the spike at about 435nm, but I am almost certain that it would be much slower than other UV sources such as BL, BLB, SA, and AQUA tubes and 1000 watt HID commercial metal halide lamps, and/or platemakers like the NuArc 26-IK.
     
  3. jbrodkey

    jbrodkey Member

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    Annie, Do you have a copy of Dick Arentz's book? If you do, look at page 12 and you'll see that most of the spectrum here is not where you want it - If you don't have the book you should really get a copy and it will save you money in the long run by avoiding things that don't work right.

    If you want to go a very cheap route, you could try a Sylvania Sunlamp. I started making Pt prints in the mid 70's using a sunlamp and some of the ones I made then and were accepted in juried shows are as good as the recent reprints using an Edwards light box. (I presume these sunlamps are still available. I haven't look recently - ) I put the bulb in a wire cage like holder with a clamp on the end which I got in a hardware store. I think workmen use them to work in dark areas....
     
  4. jbrodkey

    jbrodkey Member

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    Annie, I'm sorry. I just looked and it's not a Sylvania but a GE Sunlamp 275 watts. If you go that direction, get yourself some good uv goggles. They can be had for about $10 at places that supply tools etc.
     
  5. Annie

    Annie Member

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    Alright then I will get a proper light source... it was just the temptation of a case of free lights. Thanks again.
     
  6. rogein

    rogein Member

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    Annie,

    FWIW I use super actinics which I bought from a place out in your neck of the woods: http://www.jlaquatics.com/

    Cheers,
    Roger...
     
  7. Annie

    Annie Member

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    Roger, Thanks for the link... if the Pt printing doesn't work out I can get a guppy!