[pure-silver] Re: a recent problem with fine dust on negs
----- Original Message ----- From: "Janet Cull" <jcull@xxxxxxxxxxxxx> 
To: <pure-silver@xxxxxxxxxxxxx>
Sent: Wednesday, July 22, 2009 12:58 PM
Subject: [pure-silver] a recent problem with fine dust on negs
I have a problem I've never had before, and I'm not sure why. The last few times I've processed film the negatives have had lots of very fine dust that shows up terribly on prints. If I rinse these cut negatives and hang to dry, they're better. I'm rinsing the same way I always have when I process, so what could be the problem? I usually hang the negatives to dry in my shower, and I have recently with this problem. Last night I processed film and hung it in my darkroom. Same problem.
THe only change has been that we recently changed from well to county water. That shouldn't make a problem like this, should it?
I process, rinse, stop, fix, use perma wash, rinse in running water, then rinse in distilled water. I hang the negatives with clothes pins on a coat hanger, in the shower. We're careful not to sprinkle anything (like baby powder) in the bathroom when negatives are hanging. It's the same process I've always used. What could be causing the problem that I'm missing? 

Thank you,

Janet
Try a final rinse made up of water with Photo-Flo at half strength and about 30ml of Isopropyl rubbing alcohol per liter. Soak for about two minutes and hang up without squeegeeing. Get rubbing alcohol that is just Isopropyl alcohol and water, not the kind flavored with Oil of Wintergreen in it. Also, don't use ethyl alcohol rubbing alcohol, its denatured with various solvents. 

--
Richard Knoppow
Los Angeles, CA, USA
dickburk@xxxxxxxxxxxxx 
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