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13379Re: [PPLetterpress] exposure time/worn out bulbs?

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  • Gerald Lange
    Jan 27, 2013
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      Hi again

      Correction: Work Horse 5, not Rocket 5 (something else completely).

      Gerald

      On 1/27/13 4:44 PM, Gerald Lange wrote:
      > Wally
      >
      > Do a Google search with the terms bulbs and TL44d25/09n. There are a
      > number of suppliers.
      >
      > If your bulbs have a grayish-brown look to both ends, they are likely
      > on the wane. But that would indicate that the electrics, especially
      > the ballasts are okay. If very dark on one end, not so good.
      >
      > Did you check to make sure all the bulbs come on at once? or if there
      > is some staggering problem? You might want to redo the ballasts as
      > well. The Rocket 5 is an incredible ballast (and fairly low priced)
      > though you might be in for a major rewiring job.
      >
      > A long time ago, very early on, I think Harold Kyle mentioned that
      > Boxcar was supplying parts for Polimeros. Not sure if that is any
      > longer the case.
      >
      > Gerald
      >
      >
      >
      > On 1/27/13 4:20 PM, hersomwally wrote:
      >> I've finally gotten around to trying our Polimero A4 machine and I've
      >> got my first (of many i'm sure) question.
      >>
      >> I'm using 152sb plates and the info from boxcar says to expose for
      >> 2:30-4:00 minutes for a 17-18 on the 21 step scale.
      >>
      >> 4 minutes only got me to 13 on the scale, so I cranked it up to 7
      >> minutes and it still only got it up to 16 on the scale.
      >>
      >> Is this normal for my machine or does this mean my bulbs are worn out?
      >>
      >> The bulbs in the machine are tl44d25/09n which is a t8 20watt 18
      >> inch. I can't seem to locate any replacements in the US. any idea
      >> where to look? (I can't find it on atlanta light bulbs' site).
      >>
      >> Thanks,
      >>
      >> Wally
      >>
      >>
      >>
      >
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