TMax 3200 is really an 800 speed film, so exposing it at 400 is just a
one-stop increase.  I suggest developping normally since you want normal
contrast.

apr2705 from Lloyd Erlick,

I don't think this is a disaster. In fact, I think the results might
be very nice. Skin tones and shadow detail will be beautiful.

It's quite routine for film users to expose the material at half the
manufacturer's exposure index. I use a lot of Kodak TMY, which they
rate at 400 and which I use at 200.

The 'real' (whatever that means) speed of T-Max TMZ ("P3200") is
around 800. The name implies it can push very nicely to 3200, or at
least is supposed to. I like to set my meter at 640 for TMZ. I like
the shadow detail this way, and I just wish it would come in 120
format. Actually, TMZ seems to me to have a special grain pattern, in
the same sense that Tri-X does. I like TMZ very much. It's excellent
in a camera one carries around a lot and uses under widely differing
conditions.

Testing is essential if the exposed roll is valuable. Get another roll
of the same film and expose it at the 400 setting. Try developing it
in D76 diluted 1+1. Soak it in plain water for about two minutes
before putting it in the developer, and develop for twelve minutes at
21 degrees C. Agitate for ten seconds, once per minute. Examine the
test roll and decide if the negatives are overdeveloped or not. Making
prints might help. My guess is the roll you have will work out nicely
developed this way for ten or eleven minutes. Emphasis on 'guess' ...
and 'test'!

regards,
--le

    Go with the D76. I'd dilute 1:3 and use a time around 14 minutes at 70F. As noted
by others, this isn't a dramatic over-exposure however my experience with TMZ is that the
highlights can get pretty dense. That's why I'd use bosh the 1:3 and the abbreviated time
for development.

JD - www.puresilver.org

You will be pleased with your result being that tmax3200 is only an ISO800
film.  

According to the Massive Dev Chart (www.digitaltruth.com), the time for
Tmax3200 exposed at ISO 400, with straight D76 at 20C, is 10.5 minutes

Jan, I posted a similar thread about 3 months ago.  I had exposed a
roll of HP5 (400), at iso 100, a two stop difference.  You may be able
to find the old  thread, but the upshot was the exposure lattitude was
sufficient, that at this 2 stop difference, normal development should
yield a very printable negative.  Other comments, indicated taking off
10-25% of the development time.  I ended up taking off 12% of the
development time.  I got printable negatives, but they were flat,
compared to the great contrast range I normally get (D76 1:1 at 72 deg
F).  I suspect if I had used the normal time (13 min), they probably
would have been just right.  Live and learn.

Best regards,

Dave

Thanks everyone, I will inform my friend about what I've learned and let her
decide what to do. I'll come back here to tell the end result when she has
developed the film and made some prints. It might take some time because she's
got exams soon.

Kind regards,

Jan