[Alt-photo] back to black plague...

Denny dspector at charter.net
Wed Oct 11 16:11:03 UTC 2017

Another possible source might be a hairdryer or whatever you use to dry your prints before exposing.  I run a small HEPA air filter in the darkroom to catch anything in the air. I don't know if it helps but it doesn't seem to cause any problems. Another thing that might help is to put your paper on a lightbox and look for any specks in the paper, sometimes those can turn into black spots on the print. 

-----Original Message-----
From: Anne Eder [mailto:chansonette at gmail.com] 
Sent: Wednesday, October 11, 2017 8:22 AM
To: Denny; alt-photo-process-list at lists.altphotolist.org
Subject: Re: [Alt-photo] back to black plague...

Thanks Denny- that s exactly what I ve been doing and I know what to look for, but it s been hard to pinpoint the problem in my own set up. I m starting at square one again and beginning the process of systematic elimination once more. I am fairly certain it is metal contamination early in the printing process, just can t seem to eliminate it no matter what I do. I m going to try new FO and mix my own this time - that s about the only thing so haven t done. After that, I m wondering how to check for metal particulates in the environment, beyond the obvious rusty pipes/hinges etc. 

Thanks for your help - I will be keeping at this until I solve it.


Sent from my iPhone

> On Oct 11, 2017, at 9:49 AM, Denny via Alt-photo-process-list <alt-photo-process-list at lists.altphotolist.org> wrote:
> Anne, congratulations on the exhibit.
> There are many possible sources for the spots to originate, so I think it's up to each printer to identify and fix the problem.
> The possible sources I'm aware of include:
> paper
> chemistry
> water
> brushes
> metal introduced inadvertently from trimming the paper with metal 
> utensils bits of metal circulating in the air possibly the exposure 
> unit (rusty hinges or hardware?)
> I can't think of any other causes, maybe someone else will add to the list.
> Ultimately, the source can be identified and fixed by carefully eliminating one variable at a time.
> Denny
> -----Original Message-----
> From: Alt-photo-process-list 
> [mailto:alt-photo-process-list-bounces at lists.altphotolist.org] On 
> Behalf Of Anne Chansonette via Alt-photo-process-list
> Sent: Wednesday, October 11, 2017 6:30 AM
> To: alt-photo-process-list at lists.altphotolist.org
> Subject: [Alt-photo] back to black plague...
> This past week I was fortunate to be included in the Soho Photo Gallery Alternative Process Competition Exhibition and Living Image: an Exhibition of Traditional and Alternative Process Photography in Philadelphia. As many of you know, I have been struggling to discover the source of sudden black plague in my palladium printing, and I felt compelled to look closely at any platinum and palladium pieces also included in the shows ?and guess what? I saw the black plague specks in so many of them, to greater and lesser degrees, but very few prints were completely free of the plague spots. So I agree---I think we need to harness the hive mind of the altpro list and solve this!!
> Anyone else game?
> Best,
> Anne Eder
> www.anneeder.com
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