Katharine,
Long development might be 4 to 6 hours and I tend to swoosh my prints in the water too. My typical development is 15-30 minutes.
Marek
> Date: Fri, 16 Jan 2009 13:59:39 -0800
> From: kthayer@pacifier.com
> Subject: Re: Printing gum with little pigment
> To: alt-photo-process-l@usask.ca
>
> Hi Marek, thanks for posting these. I will probably have more to say
> about this later, because the issue of pigment and tonality has been
> on my mind for quite a while too, but first a point of
> clarification: what do you mean by "long development" written on the
> lesser pigent test strips; is this a different development than for
> the other (more pigment) case, or the same? Thanks. BTW, I think
> this is a good and useful issue for discussion, and thanks for
> bringing it up.
> Katharine
>
>
>
> On Jan 16, 2009, at 9:33 AM, Marek Matusz wrote:
>
> >
> >
> > Hi all
> > I was waiting for a dry spell to bring this up. A while back Judy
> > made a statement that printing gum with little or no pigment allows
> > for a very extended range. I looked back through the Post Factory
> > issues and really could not find examples. Hey Judy thanks for
> > sparking my interest.
> > Since I was messing around with the post-flash and was getting good
> > results in extending tonal range of the print I decided to do some
> > experimentation and actually print some test prints.
> > http://picasaweb.google.com/marekmatusz1/ExtendedGumRange#
> >
> > Two sets of tests are done with same water/gum/dichromate but
> > different pigment concentrations. I have made different exposures
> > and tested two development times. I used indantrone blue which is a
> > wonderful dark blue and non-staining. I can not see that low
> > pigment concentration extends the rane of gum print, to the
> > contrary it allows less steps to be separated on a standard step
> > tablet. One of the tests is also a good illustration of how
> > delicate highlights with dark shadows can be printed with the same
> > negative with the postflash.
> > Anybody else want to chime in. It would be great to see some
> > illustrations. A picture is worth a thousand words.
> > This contrast vs. pigment issue has been on my mind for a while.
> > Marek
> >
> > Windows Live™ Hotmail®: Chat. Store. Share. Do more with mail. See
> > how it works.
>
Windows Live™ Hotmail®: Chat. Store. Share. Do more with mail. Check it out.
|