[Alt-photo] Alt-photo-process-list Digest, Vol 177, Issue 5

Siegfried Rempel siegfriedrempel at gmail.com
Thu Oct 12 00:49:12 UTC 2017


Anne do you have someone, a colleague near by that doesn't have the problem that would allow you to print a trial print with your new supplies?
It might help identify if the issue is associated with your physical environment.

Sent from my iPhone

> On Oct 11, 2017, at 5:37 PM, Anne Chansonette via Alt-photo-process-list <alt-photo-process-list at lists.altphotolist.org> wrote:
> 
> Hey Mark,
> 
>     That's a good idea---to coat a piece of paper and leave it in the dark
> room to see if anything settles on it. Denny also has a good point with the
> hair dryer.
> 
>     So far I have tried:
> 
> New brush
> New chemistry (have been buying FO in solution from B & S- will try buying
> dry from Artcraft next)
> Tearing my paper with a glass edge rather than a stainless steel rule
> Replaced droppers and all other containers used for soaking brushes or
> mixing sensitizer
> Thoroughly cleaned workspace and put clean paper down on table
> Use only distilled water
> 
>     I print on Hahnemühle platinum rag. As I told Chris in our off-list
> exchange, I tried coating a piece of Rives that I had kicking around for
> gum and it was much worse. I saw the plague spots after the coated paper
> sat for a few minutes, before even exposing or developing. Generally on the
> HPR, I am not seeing the spots until after development. However, I want to
> make 100% certain that is the case. I was out of the lab this week and had
> to travel, but now that I am back I am ready to start from scratch and get
> this resolved.
> 
>     Thanks again, I will post results of the next round of investigation.
> Or I'll start drawing birds lol ;)
> 
> Anne
> 
> 
> 
> On Wed, Oct 11, 2017 at 4:35 PM, MARK NELSON via Alt-photo-process-list <
> alt-photo-process-list at lists.altphotolist.org> wrote:
> 
>> Anne,
>> 
>> Maybe coat a sheet of paper and leave it in your darkroom in total
>> darkness for a couple of days on a counter where you work.  See if
>> something is settling on it?
>> 
>> It could even be clothes that you wear…. so if I were in my metal shop and
>> grinding tool steel, then went to make a print…I would have a print that
>> looks like I spilled pepper on it.
>> 
>> Best Wishes,
>> Mark Nelson
>> 
>> Welcome to the Precision Digital Negatives Home! <http://www.
>> precisiondigitalnegatives.com/>
>> PDNPrint Forum at Yahoo Groups <https://groups.yahoo.com/neo/
>> groups/PDNPrint/info>
>> Mark I. Nelson Photography - Welcome <http://www.markinelsonphoto.com/>
>> CURVE CALCULATOR III FOR THE MAC NOW AVAILABLE!!!!
>> 
>>>> On Oct 11, 2017, at 11:11 AM, alt-photo-process-list-
>>> request at lists.altphotolist.org wrote:
>>> 
>>> 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.
>> 
>> _______________________________________________
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