RE: [APML] Tech Pan Development

[Kirk Carbo <kcarbo@lobosservices.com>]

Brian,

Fixer performs the same function with prints as it does with film. I used to
have fixer for film and fixer for paper because the Kodak fixer I used
recommended a higher concentration for film.  The rapid fixer I use now is
the same concentration for film and paper, so I use it for both.  Make sure
you keep the film in the fixer for the required time.  The time will get
longer as the solution approaches its' capacity, but the recommended time is
more than adequate.  Getting all of the fixer (hypo) out of the film when
you wash it is what is important if you want to keep your negatives for a
long time.  Do a quick wash in water, then soak the film in a hypo clearing
agent, then do your final was in water.  You should use the same hypo
clearing agent in the wash cycle of your prints.  It shortens the wash time
and makes it more effective.

Kirk Carbo 

>-----Original Message-----
>From: Brian larmay [mailto:power_windows4789@yahoo.com]
>Sent: Wednesday, August 18, 2004 3:19 PM
>To: Discussion of Film Astrophotography
>Subject: Re: [APML] Tech Pan Development
>
>
>
>Very interesting about the pennies kirk ;) ..i think i
>might try it just for kicks.
>
>Ok..heres a question ...
>
>What if you use the fixer for prints and then use it
>for developing negs?
>Is this safe?
>Ive been using the fixer Ive had for about two weeks
>which is used for my 8x10 prints to fix, and my tmax
>and TP fix.
>I havent noticed any probs so far, but what about in
>the long run, will my negs or prints show artifacts
>later?
>
>Any comments?
>Brian
>
>> 
>> In a message dated 8/18/04 9:11:28 AM,
>> shammonds@creatorsview.com writes:
>> 
>> 
>> > Hey Guys,
>> > I finally had clear skies and time off together
>> for a change. It has been a
>> > while since I last shot any TP and this developing
>> question has come up. How
>> > many times can I use my mix of Rapid Fixer before
>> I need a new batch? I know
>> > the package says it will keep for a while stored
>> properly, but I've been out
>> > 3 of the last 5 nights and plan to go out again
>> tonight. I just mixed a new
>> > batch for developing the shots I took last night
>> and they look pretty good,
>> > how many more times can I comfortably use this
>> batch. Thanks,
>> > 
>> > Scott Hammonds
>> > 
>> 
>> 
>> Scott:
>> Fixer, any fixer, lasts a long time and is not
>> affected by light or 
>> temperature in storage.
>> What exhausts fixer is 'fixing film'.
>> You didn't mention what size of fixer you mixed, but
>> you have to run a lot of 
>> film thru it to exhaust it.
>> There is a product called Edwal Hypo Check   (and
>> others) that   allows you 
>> to check your fixer.
>> All you do is put one drop of Hypo Check in your
>> fixer container and if a 
>> yellowish-white cloud forms, it's exhausted. If not,
>> keep on fixing.
>> 
>> An interesting side note. Fixer fixes film by
>> removing unexposed and 
>> undeveloped silver from the emulsion. Therefore,
>> when fixer is exhausted it's full of 
>> silver. If you pour some exhausted fixer in a
>> container and drop in a few 
>> pennies, the silver will 'plate out' on the pennies,
>> turning them a silvery white. 
>> It's not all that permanent, but kids love it. Large
>> volume film processers 
>> recycle their exhausted chemicals containing silver
>> and get paid for it.
>> 
>> Kent Kirkley
>> > _______________________________________________
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>> Astro-Photo@seds.org
>> http://seds.org/mailman/listinfo/astro-photo
>> 
>
>
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