[pure-silver] Re: what causes pinholes in emulsion?

If the acid stop bath is too strong Shannon it can cause that.  Now for a suggestion put the film under the highest power loupe you might have and look really close.  Is it actually a hole or has some of the emulsion just come off and nothing really penetrated the base of the film.  Once in a while a tiny piece of the emulsion will come off leaving the appearance of a pinhole on paper.

How were the negatives stored?  Did they slide out of the sleeves easily?  Storage conditions could have had an impact, but being over a year ago from when they were processed it will likely be difficult to really pinpoint a cause.  If they were processed at the same time and made by two different manufacturers, you likely have eliminated the possibility of a manufacturers defect.



-------- Original Message --------
Subject: [pure-silver] what causes pinholes in emulsion?
From: Shannon Stoney <shannonstoney@xxxxxxxxxxxxxxx>
Date: Fri, February 20, 2009 12:32 pm
To: pure-silver@xxxxxxxxxxxxx

I am printing some film that I shot over a year ago, and there are
lots of pinholes in the emulsion. At first I thought it was the brand
of film, and one roll did seem worse than the others: the Bergger
roll. But the problem is on the FP4+ negatives too. Maybe it was
something in my processing that day? I seem to remember that if the
temperature difference between the developer and stop is too much, like
if the developer is warm and the stop is really cold, it can happen.
Is that right?

--shannon

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