Re: Times and Temperatures

[boblong@xxxxxxxxxxx (Robert Long)]

On Thu, 05 Sep 1996 16:21:19 +0100, Cor Breukel wrote:

|On Thu, 5 Sep 1996, Robert Long wrote:
|
|> On Thu, 05 Sep 1996 12:25:29 +0100, Cor Breukel wrote:
|>=20
|> |I use D76 routinely: for HIE expose through #25 red, through the lens
|> |metering, camera on 250 ASA, process: D76 1:1 dilution (as I =
understand
|> |diluted D76 gives less grain, I know that Kodak recommends to use D76
|> |undiluted), for 11 minutes at 20 degC. This gives me good results =
with not
|> |a too dominant grain..
|>=20
|> Thanks.  As a matter of fact, the instruction for D76 include
|> life-expectancy data for 1:1 as well as full strength, though the
|> instruction sheet for HIE says just "D-76" with no qualifier (so I
|> would assume full strength) and 11 minutes at 20 degrees for a small
|> tank.  I would have expected longer development times would be needed
|> with the dilute developer, but perhaps Kodak is assuming greater
|> contrast?
|.well I found my recipe out by accident, that is I assumed that I had to
|dilute, later I realized that Kodak meant UNdiluted, but I liked my
|results nevertheless..(saves money also ;-) )..

This really has me confused.  The more carefully I think about it, the
less possibility I see of having done something wrong with the one
roll I developed 1:1.  I was just working with some of the negatives,
and the ones developed full strength are very good, but the once that
I developed 1:1 require a very large increase in contrast in Photoshop
to get usable results.  And probably as a result of that arbitrary
contrast expansion, I don't think the grayscale is as even and
engaging as that in the prints from the full-strength negatives.

Many years ago I tried D-76 briefly at 1:1 and I seem to remember that
it required significantly longer development times than full-strength,
which stands to reason because there actually is less developer
(ignoring water) in the tank.  Yet both you and George seem to be
saying that no increase in developing time is required.

Bob Long
(boblong@xxxxxxxxxxx)

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End of INFRARED-PHOTOGRAPHY Digest 105
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