Re: Introduction

["phillip geller" <filje@xxxxxxxxxxx>]

> --- pete <peteray@xxxxxxxxxx> wrote:
> > >Though sodium sulfite is added as a preservative, it definitely eats
away at
> > >the grain.
> >
> > That's like saying that your house is smaller because you scraped
> > some paint off the exterior.
>
> No, it's like saying that sodium sulfite eats away at the grain clusters.
The
> ingredient makes a difference in the look of the results.  If you do some
> testing you will find this to be the case.
>
> george

I have to agree with george. It is true. Different components affect the
structure of the grain. The sulfite does act as a solvent.
After reading the first posts I went to the Kodak web site to research
Xtol.   One of the chemists that created Xtol had a interesting comment.
http://www.kodak.com/country/US/en/corp/pressReleases/pr19960912-01.shtml
"Xtol developer has some interesting features. Zawadzki said that by careful
selection of developing agents the speed of most films could be increased,
adding more detail to the shadows. At the same time, the developer produces
finer grain negatives. "If you dilute the working solution, this developer
compensates for the slight sharpness losses caused by constant agitation in
rotary tube processors,"
another quote
"She explained that edge effects determine sharpness and how grain looks in
the final photograph. The chemical enhancement process that acts on the edge
of the silver grain is the result of developer and halide solvent combined
with agitation. "If you dilute this developer or agitate less, you will get
more sharpness but some increase in grain," Zawadzki said.



Then I talked to a tech rep and he couldn't exactly explain what goes on
with Xtol
but promised to send me info in the mail.

Anyway, D76 will give you sharper grain if not diluted. Hc 110 develops film
with
more rounded grains. Rodinal makes big and sharp grains. Anyone tried the
new
Ilford  Ilfotec DDX developer?

Phil







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