[rollei_list] Re: Rollei Retro Film
- From: Marc James Small <marcsmall@xxxxxxxxxxx>
- To: rollei_list@xxxxxxxxxxxxx
- Date: Mon, 25 Feb 2008 01:52:11 -0500
At 01:38 AM 2/25/2008, Richard Knoppow wrote:
> Are you using a hardining fixing bath? If not try one
>and see if if it helps with the curling. Curling is mostly
>caused by the differential shrinking of the emulsion vs: the
>support. Most film, both roll and sheet, has a coating of
>gelatin on the back to counteract the curling. Usually this
>back coating also contains the anti-halation dye. The dye is
>changed to a colorless form by the sulfite in the developer
>and fixing baths. Not all films have anti-curling coatings.
>My suggestion about the hardener is that it will tend to
>reduce the amount of shrinking.
I have been warned for four decades to avoid a=20
hardening fixer. I never knew WHY hardening=20
fixers existed. Me? (a Dative of Reference, for=20
you Indo-European Scholars in our midst) I will=20
stick to a non-hardening fixer and to Hewes=20
reels. I also let the film hand for a day or so=20
before printing it unless I have a rush=20
commercial job (which I've not had in the past six or seven years).
Marc
msmall@xxxxxxxxxxxx
Cha robh b=E0s fir gun ghr=E0s fir!
---
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