RE: Spots on negatives

[Theo Benson <TBenson@xxxxxxxxxxxxx>]

Ernest, I've had the same problem, and I believe I know what it is.

Are you using stop bath (acetic acid)? With D-76 and Rodinal (my favorite
for HIE) stop bath apparently causes small effervescent bubbles on the
emulsion, which lift it from the backing and cause those permanent "spots."
I simply avoid stop bath entirely, substituting a quick water rinse instead
to make my fixer last a little longer.

By the way, I use AGFA Rodinal 1+50 at 68 degrees F for about 16 minutes.
Gives great tonal range!

Hope this helps...

Theo

> -----Original Message-----
> From:	Ernest Nitka [SMTP:enitka@xxxxxxxxxxxx]
> Sent:	Tuesday, July 14, 1998 3:30 PM
> To:	infrared@xxxxx
> Subject:	Spots on negatives
> 
> Howdy - looking for help on why I have some white spots on my hi speed
> infrared negatives.  I developed them using HC110 B at the
>  rec. time of 6.5 min and 68F in a stainless steel tank given a good
> several
>  raps at the start of the developing process.  The white spots are not
>  something I've seen with my usual B & W negatives.  Any ideas or
> solutions.?
>  White spots are not on every negative or are they in the same location in
>  those negatives that have them .  To me they look like bubbles that
> didn't
>  allow proper development.  Does anyone on the list normally pre-soak
> their
>  negatives - if so how much should the development time be reduced if
> using
> a
>  pre-soak?
> 
>   Ernie Nitka
> 
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