White spots (was: Re: ASA 640 for HIE)

[Marco Pauck <pauck@xxxxxx>]

"Ibrahim PAMUK (Ank,IH)" wrote:
[...]
> My problem is the white spots. I do my best to do everything which includes
> sending samples to Kodak. I believe that these white spots I am getting is
> due to fault in manifacturing. Some friend said in the list that these spots
> tend to be less when the solution prepared using pure water. That may be
> correct, but I can not get consistent results.

I also had problems with spots but only when developing HIE
in XTOL not D-76.

Sample 1:
full size: http://www.pauck.de/marco/photo/infrared/hie/defects_from_xtol1a.jpg
enlarged:  http://www.pauck.de/marco/photo/infrared/hie/defects_from_xtol1b.jpg

Sample 2:
full size: http://www.pauck.de/marco/photo/infrared/hie/defects_from_xtol2a.jpg
enlarged   http://www.pauck.de/marco/photo/infrared/hie/defects_from_xtol2b.jpg

Do 'your' spots look similar to 'mine'?

I don't think that these defects are relared to the frequently
discussed pinhole problem. They are probably caused by air
bubbles. However, I never found out why this problem occurred
(at least for me) only with XTOL and not D-76.

See also my early post
http://www.pauck.de/archive/mailinglist/infrared/mhonarc/msg08597.html

	Marco
--
Marco Pauck -- marco@xxxxxxxx -- http://www.pauck.de/marco/
For every complex problem, there is a solution that is simple,
neat, and wrong.  -- H. L. Mencken
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