[pure-silver] Re: Unreachable Scum in Print Washer

  • From: "EJ Neilsen" <ej@xxxxxxxxxxxxxxxxxxxxxxxxxx>
  • To: <pure-silver@xxxxxxxxxxxxx>
  • Date: Sat, 10 Mar 2007 23:50:11 -0600

Steve, my understanding is that it is a helping to break the bonds that the
iron is forming that keep it in place; i.e. attached to the scum. It also
raises the pH as it is around 11. CRL is also a similar product to Lime
Away. I haven't checked the two side by side though. 

When I relied on a well for my water, and I wanted to keep my print washer
full, I'd put a few drops in after I pulled my last print for the day. It
help the scum from forming. It did require a bit longer to run before my
first print in the washer on next use. 



Eric Neilsen Photography
4101 Commerce Street
Suite 9
Dallas, TX 75226
http://e.neilsen.home.att.net
http://ericneilsenphotography.com
Skype ejprinter
> -----Original Message-----
> From: pure-silver-bounce@xxxxxxxxxxxxx [mailto:pure-silver-
> bounce@xxxxxxxxxxxxx] On Behalf Of Steve Nicholls
> Sent: Saturday, March 10, 2007 6:58 PM
> To: pure-silver@xxxxxxxxxxxxx
> Subject: [pure-silver] Re: Unreachable Scum in Print Washer
> 
> EJ Neilsen wrote:
> > Have you tried Lime A way or an Acid bath made from Glacial acid? Those
> > should rid the system of calcium/mineral deposits and build up that is
> stuck
> > to that. Now for the iron and dirt particles that have avoided your
> filters?
> > You might try a mix of EDTA tera sodium. Do this after a good rinse in
> > between.
> >
> > Eric
> >
> >
> Eric do you know what the EDTA does in this situation?
> 
> Also to any chemists on list what is the purpose of EDTA in B&W
> photographic formula? Can it be added to standard developers such as D76
> in the same manner as PMK?
> 
> Curiously
> 
> Steve.
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