Re: Spots on HIE / HIE in D-76 and XTOL

[Marco Pauck <pauck@xxxxxxxxxxxx>]

Hondo wrote:
> 
> Marco Pauck wrote:
> >
> > > Join in on the D-76 discussion. What temp and time do you use with D-76
> > > and HIE? I had posted that I tried it at 68 degrees (20 c) for 12
> > > minutes and got very thin negs, which is partly because of
> > > underexposure.
> > >
> > > Should 12 minutes, 20 degrees, 1:1 be sufficient in your opinion?
> >
> > Sorry, but I don't have the times at hand. I just used the time for 1:1
> > 20 deg. as recommended by Kodak.
> 
> But on my instruction sheet( a recent version, beacuse it lists 8 1/2
> sec for straight D-76) there is no time listed for a 1:1 ratio. I prefer
> to use this dilution, as I would like to develop TMAX along with it. To
> restate the question, ,....."If Kodak recommends 8 1/2 seconds at full
> strength, what would be the equivalent 1:1 dev time?"

I always used D-76 1+1 at 24 deg. C for 16 minutes, but can't say
if this was an offical recommendation by Kodak. I couldn't find
it in my specs, just in my personal lab notes.

While checking Kodak's specs I got really confused:

It is indeed true that Kodak changed their recommended time at least
for D-76. My F-13 sheet from April 1996 lists the old value 11 min and
the one from January 1999 8.5 min. (The change was probably made in 1997
as I have a instruction sheet from a film box of that year that already
lists the new time.)

What I find surprising is that both times are specified for a CI
(contrast index) of 0.7! For plain films Kodak usually recommends a
CI of 0.58 (less contrast) and that was the value I used to pick the
'appropriate' time for XTOL. Now wonder that I got thin negatives!

But 0.58 is OK for me using T-MAX films in T-MAX developer (I'm using
a condensor enlarger.)

Hmmm, doesn't look like proper densiometry to me, more like voodoo ...

	Marco
-- 
Marco Pauck - WMD GmbH Hamburg, Germany - http://www.pauck.de/marco/
e-mail: marco@xxxxxxxx, phone: +49-40-58958-120, fax: +49-40-58958-199
For every complex problem, there is a solution that is simple, neat,
and wrong.  -- H. L. Mencken
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