From: garimo (omirag@cruzio.com)
Date: 02/11/02-05:26:06 PM Z
I've never tried to chemically alter the Van Dyke Brown formula to get
greater contrast. But I have found some increase in the print contrast
by intensifying the negative in kodak selenium toner. Works very well
with lith negatives.
garimo
Sandy King wrote:
>
> Judy Seigel wrote:
>
> >
> >I've found that "contrast control" in a lot of VDB formulas, tho I don't
> >remember one in particular.
>
> I have only used the classic vandyke formula, the one described by
> Bob Schramm as VDB-1 in Issue #1 of Post-Factory. What other formulas
> have you used successfully?
>
> > I also found that it didn't work, but it
> >didn't work differently for me than it didn't work for you. That is, the
> >dichromate in the sensitizer, even a tiny bit, DID increase the contrast
> >but simultaneously stripped the highlights. Contrast was gross, and
> >exposure time much longer.
>
> Actually I think we are describing the same result. I think you will
> find that if you do the test again it did not give a real increase in
> contrast but an apparent one due to the dramatic increase in exposure
> times. I suspect this will be so because several others have
> confirmed to me that this is the result they had from putting
> dichromate in the sensitizer.
>
> >
> >My hunch however is that it may have worked for someone who managed to add
> >even less dichromate.
>
> Maybe, but my hunch is that the method just does not work. I tried
> lots of variations on the theme and saw no result.
>
> However, I am convinced that there must be some way to reduce
> contrast with VDB-1 so further experimentation would be in order.
>
> Sandy King
>
> --
This archive was generated by hypermail 2b30 : 03/08/02-09:45:21 AM Z CST