[pure-silver] Re: Weird Film Issue
- From: "Richard Knoppow" <dickburk@xxxxxxxxxxxxx>
- To: <pure-silver@xxxxxxxxxxxxx>
- Date: Mon, 7 May 2012 08:58:00 -0700
----- Original Message -----
From: "Adrienne Moumin" <photowonder2010@xxxxxxxxxxx>
To: "Pure Silver" <pure-silver@xxxxxxxxxxxxx>
Sent: Monday, May 07, 2012 6:07 AM
Subject: [pure-silver] Weird Film Issue
Just finished a marathon week or so processing 30+ rolls of
120 film, by hand in 2- and 3-roll Jobo tanks.
Experienced a weird phenomenon, not sure what or why:
Taking the dried film down, I noticed in random areas a
slight "film," and some beads of dried chemistry (?), on the
non-emulsion side, as though from too-little diluted
Photo-Flo (even though I use just a tiny amount).
Last couple of tanks yesterday, I decided to omit the last
step Photo-Flo, and just hang the film after the final
10-minute wash.
Discovered this morning, the mysterious film and line of
dried "beads" is there on 3 of the 5 rolls - even worse than
before! Random dried liquid splashes and splotches all down
the length of the rolls, a total mess. The only saving
grace is that they are on the non-emulsion side.
I will re-reel and rinse them thoroughly in warmed distilled
water while sending out prayers to the universe that this
will remedy the problem; I am wondering whether this is
something I will have to do from now on at the end of the
processing procedure?
I would welcome any suggestions from anyone in the group.
Thanks in advance,Adrienne Moumin
Adrienne Moumin
Handmade B&W photographs and photo-collages:
www.picturexhibit.com
If this is is from hard water as suggested by some it
will help to use either distilled water or boiled water as a
final rinse. Boiling for a few minutes and allowing the
water too cool will remove much hardness.
A rinse consisting of a combination of Photo-Flo and
alcohol works better than Photo-Flo alone. For a liter of
rinse use about an ounce of 70% rubbing alcohol and half a
capful (about 2.5 ml) of Photo-Flo, about half the
recommended amount. Let the film soak in this for about two
minutes and hang up to dry without squeegeeing. Squeegeeing
can cause scratches if there is any grit on the surface. The
emulsion and anti-halation coating will be relatively soft
because they are wet, especially if a non-hardening fixer
has been used so will be quite vulnerable to scratching.
The film with the marks can be soaked in a acetic acid stop
bath, swab with coton balls if necessary, then washed for a
couple of minutes and treated in the above wetting agent.
I am not quite convinced this is due to hard water.
Since the film was processed in multiple roll tanks were the
rolls with marks from the same tanks? Was there anything
else they migh have in common?
--
Richard Knoppow
Los Angeles
WB6KBL
dickburk@xxxxxxxxxxxxx
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