RE: [APML]: Salvaging Over Hypered TP

[Chris Cook <ChrisCook@platsoft.com>]

John,

Under developing TP will not work.  My experience with this is that it
will result in uneven development marks, especially under 4 minutes.
You will also end up with a less contrasty negative that will not have
the full tonal range of a properly developed neg.
You are wasting your time.  I would hyper some new film.  The time and
clear skies spent at taking the photos is worth much more.


Chris
  

> ----------
> From:         John F. Wall[SMTP:jfw@spectranet.ca]
> Sent:         Friday, February 06, 1998 9:55 AM
> To:   astro-photo@nightsky.com
> Subject:      [APML]: Salvaging Over Hypered TP
> 
> 
> I have inadvertently over hypered my last batch of Tech Pan.  I
> developed a
> test strip for 6 min./D-19/68F and it came out too dark.  I tried
> another
> strip at 4 min. and it was better but still too dark and the third
> strip at
> 3 min. seemd to be at least close to being useable.
> 
> Am I wasting my time (you know - those 1 hour exposures out in the
> cold
> that one cherishes so much) by using a batch of film that only
> developes
> out well at 3 min.   
> Thanks
> John Wall
>