Re: btzs tubes and clearing kodak films

Shannon:
Just trie to wash with water at 24° Centigrades, for 5 minutes o more.
You¨ll see that Tmax finish transparent.

Osky

----- Original Message -----
From: "shannon stoney" <sstoney@pdq.net>
To: <alt-photo-process-l@skyway.usask.ca>
Sent: Thursday, February 26, 2004 8:01 PM
Subject: Re: btzs tubes and clearing kodak films

> >There are two issues. One is clearing of the emulsion in fixing. We
> >normally fix for about two times the clearing time and times don't
> >vary very much with films. The other issue is clearing of the
> >anti-halation backing of the base. This varies a lot with films, and
> >I understood that your original question was about this.
>
>
> Oh. How can you tell if the anti-halation layer has cleared?
> sometimes I think it has, and then I see when I wash the film that it
> is a bit bluish. I usually don't notice this until it's already in
> the wash. Can you see it in the fix and clearing bath? I noticed
> today that the hypo clearing bath was noticeably blue after I removed
> the films from it. I guess that means that some anti-halation stuff
> came off in that bath.
>
> --shannon
Received on Fri Feb 27 04:59:13 2004