Re: pinholes

[Goff Photography <jdgoff@xxxxxxxx>]

At 06:25 PM 6/18/97 +0100, you wrote:
>>These 'pinholes'
>>do look very similar to dust but are not.
>
>>always circular, totally clear
>>in the middle but with defused edging.  The only way I can describe it
>>better
>>is that it was similar to the way mold looks when it grows, Strong in the
>>center
>>and then weaker as it spreads out.
>
>
>This description is exactly the problem I asked about last week.
>
>
>>Your analysis is consistent with what I've seen on 4x5 HIE.  I have
>>heard other photographers put the blame on Kodak.  Some mfg problem. In
>>my experience, not every box of HIE will have the pinholes.  Just most
>>of 'em.  Definitely NOT dust spots.  And definitely a problem that Kodak
>>should solve.
>
>
>I have found since, that the spots do not show up when using the jobo 
>processor.  I have processed 4 rolls of test film on 4 seperate days and 
>no spots.  However they were on every roll that was processed by hand 
>(some more that others). 
>
>
>> with the jobo processing a new problem has =
>>arrisen.  i am getting streeking running the length of the film.  it =
>>looks like a water stain but can only be seen when printed.  normal =
>>water stains can be seen by carefully examining the emulsion side of =
>>the neg, but when i do so, i see nothing.  the lab thought it might =
>>be a problem with kodak's photoflo so they switched to edwal's =
>>lfn...same problem.  does anyone have ideas on wetting agents?>  =
>>should we try it without?  could the streaks have something to do =
>>with the constant uni-directional agitition of the jobo?
>
>> After a lengthy discussion, =
>>the man that processes the film confessed that he "may have let the =
>>wetting agent dry on the film".  So i will run another test on monday =
>>and make sure he squeegees the film before it dries.  I will get back =
>>to you with the results asap.
>
>
>So the above mentioned test was done and the wetting agent was wiped off 
>berore it dried on the film, and the problem remains. Anyone have ideas?
>Thanks
>-Greg Pease 
>*
>****Greg, I don't know which model JOBO you use, but I thought all models
reversed direction during processing. Mine does, at least. I've never seen
the streaks you describe when using mine. Without seeing those streaks, it
is difficult to make much of an analysis or suggestion. However, some
thought come to mind: 1) are you using a sufficient quantity of all
solutions to cover the film properly--look to the JOBO quantity
recommendations; 2) do you think a pre-developing water bath might help; 3)
if you are using a highly dilute developer, is there enough developing agent
in the working solution to provide the energy needed for developing; 4)is
your developing time greater than approx 5 min, as recommended by JOBO; 5)
are you using an acid or plain water stop bath.  I'm at a loss to figure out
why the streaks are only visible when printing. Do the streaks appear to be
a colored stain that would effect the paper emulsion? I don't know if this
has been of any real help, but good luck.........James Goff CPP
>*******
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