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

What happened was a little bit of the emulsion came off. And this happened right away, not during storage, because the holes were there when I first printed the negatives at a smaller print size a year ago. I'm printing them again bigger, and so the black spots in the sky are more visible and annoying.

--shannon


On Feb 20, 2009, at 4:14 PM, mark@xxxxxxxxxxxxxxxxxx wrote:

<x-tad-bigger>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.</x-tad-bigger>

<x-tad-bigger>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.</x-tad-bigger>



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

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

<x-tad-bigger> --shannon</x-tad-bigger>

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