From: John Richardson (jrplatinum@earthlink.net)
Date: 05/14/00-03:03:30 PM Z
Who is anyone on the list using for lightjet output? EPS/Muse-X here in Los
Angeles is no longer offering the service, and I am in the middle of printing a
portfolio for another photographer.
Thanks,
John Richardson
Nick Makris wrote:
> My thanks to Judy, Kerik, Eric, Carl and Jeffrey for their input to
> resolution/tonal seperation problem I'm having with my recent prints. Some
> clarification is required here.
>
> First, let me say the problem is very subtle and that the negatives (8X10)
> I'm using are digital negs from a Lightjet. The one in particular, contains
> detail in both the shadows and the highlights and I have previously had
> better results from this neg. and in conjunction with the print frame I have
> been using.
>
> This leads me back to the Ferric Oxalate change that I made recently, where
> I am now using a one solution formula with no Potasium Chlorate. In mixing
> the sensitiser, I am using equal arts of FO and PT/PD with one drop of H202
> (3% drugstore variety undiluted).
>
> The negs can be printed for either the highlights or the shadows but not for
> both and some confusion exists herein about which way to proceed. My
> preference is to print these negs as they exist and to change my coating
> solution to include or not include something as opposed to changing my negs
> or my developer. After researching the my archives I found that either
> Postassium Chlorate, Potassium Dichromate, Ammonium Dichromate or H202 in
> various strengths may produce the desired results, but I don't have a clue.
>
> The key here is that these negs seem to have a contrast range that is
> greater than what my procedure will print, but contain detail where I expect
> to see detail.
>
> It could be that the addition of H202 (which I was using previously with
> success) is adding unneed contrast. I would have thought that with no
> Postassium Chlorate I would have needed some additional contrast.
>
> Some direction along these lines will be *very much appreciated*.
>
> As for differentiating between tonal seperation and resolution - I also have
> a hard time with that. These negs seems to have good resolution and tonal
> seperation at both ends, however, I would be hard put to describe the
> difference between them except to say that I am able to see differences
> within the same tonal range.
>
> Many thanks,
>
> Nick
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