Re: Re: [APML] TP Pre Rinse

[lkt <tan@cox.net>]

I just wanted to add that I do not presoak hypered TP. Nevertheless once in a while maybe 1 out of 6-7 times I get mottling in my processing. This usually happens at the edges. So I think it might be due to uneven washings. I am referring to 35mm hypered TP used in my Schmidt. I have been adviced to presoak but have not done any experiments with this. I think its time to test this out. Interestingly the person who adviced me to do this used to process 120 film used in a 14" Celestron Schmidt. 

Loke




> 
> From: "John C. Mirtle" <jmirtle@shaw.ca>
> Date: 2002/04/09 Tue AM 03:03:11 EDT
> To: astro-photo@seds.org
> Subject: Re: [APML] TP Pre Rinse
> 
> Thanks for the info Jim, and for sacrificing a sheet of film! I have always
> been a pre-soaker, and have always had some degree of mottling. Time for a
> change. (especially in the weather) I never really thought much of it, as
> water is the prime ingredient in the developer. Your results - and Kent's
> comments - seem to indicate otherwise. Maybe this means that I can catch up
> to Loke with Schmidt tri-color shots!
> 
> John Mirtle
> Calgary, Ab. Canada
> 
> ----- Original Message -----
> From: "Jim Janusz" <jjanusz@dc.rr.com>
> To: <astro-photo@seds.org>
> Sent: Tuesday, April 09, 2002 12:05 AM
> Subject: Re: [APML] TP Pre Rinse
> 
> 
> > Well for what it's worth I ran my test tonight.  I knew better but I
> > actually tested two things at the same time, not good for scientific
> > accuracy.  The two test parameters were the five minute water pre-rinse
> and
> > a new Jobo 3010 expert rotary developing tank.
> >
> > The test was to use the new tank and do all of the other steps as I
> normally
> > do and add the pre-rinse.  I used one sheet of hypered and one sheet of
> > un-hypered 4x5 TP.
> >
> > Results were a disaster for the hypered sheet.  It was totally ruined with
> <- snip ->
> 
> 
> 
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