8x10 processing question, clearing back of film

I'm not using a JOBO, but my rotary processor has bidirectional
rotation.

Steve



On Wed, 20 Aug 2003 15:57:04 GMT, "Gregory W. Blank"
<WhoWill.TakeThisOut@hear-who.net> wrote:

 >In article <nn47kvg5p7mo96dg81jgg809o2fo0l5n8r.TakeThisOut@4ax.com>,
 > wolvertone!!@yahoo.com wrote:
  >> Hey!
  >> I just started processing my own 8x10 film. I'm using Ilford Delta
  >> 100 and Xtol.
  >> My question is this: After processing should the negative be clear on
  >> the back, or should it have a greenish/grey haze to it?
  >> I'm using a paper rotary processor and processing for the recommended
  >> times. The negative seems to be processed properly, pretty even, but
  >> the areas of the neg where it should be clear aren't because of the
  >> back of the neg.
  >> Do you think because I am using a paper processor that there is not
  >> enough agitation on the back of the neg to clear it off?
  >> My main problem is that the negative won't print cyanotype even after
  >> being out side in bright sunlight for an hour!!
  >> Thanks
 >
 >Use the lift arm of the Jobo "if it has one" to rock the drum
 >front to back, that will move chemistry across the film and
 >behind it in two directions as opposed to the normal one
 >direction of flow.....that should solve the problem.....I use
 >my paper drum all the time without incident.<!-- ~MESSAGE_AFTER~ -->
 >> Stay informed about: 8x10 processing question, clearing back of film 

<wolvertone!!@yahoo.com> wrote in message
news:nn47kvg5p7mo96dg81jgg809o2fo0l5n8r@4ax.com...
 > Hey!
 >
 > I just started processing my own 8x10 film. I'm using Ilford Delta
 > 100 and Xtol.
 >
 > My question is this: After processing should the negative be clear on
 > the back, or should it have a greenish/grey haze to it?
 >
 > I'm using a paper rotary processor and processing for the recommended
 > times. The negative seems to be processed properly, pretty even, but
 > the areas of the neg where it should be clear aren't because of the
 > back of the neg.
 >
 > Do you think because I am using a paper processor that there is not
 > enough agitation on the back of the neg to clear it off?
 >
 > My main problem is that the negative won't print cyanotype even after
 > being out side in bright sunlight for an hour!!
 >
 > Thanks
 >
Some sheet films have a coating on the back of the film for retouching
purposes. The film will not look completely clear. Could this be what you
are referring to?<!-- ~MESSAGE_AFTER~ -->
 >> Stay informed about: 8x10 processing question, clearing back of film 

<wolvertone!!@yahoo.com> wrote in message
news:nn47kvg5p7mo96dg81jgg809o2fo0l5n8r@4ax.com...
 > Hey!
 >
 > I just started processing my own 8x10 film. I'm using
Ilford Delta
 > 100 and Xtol.
 >
 > My question is this: After processing should the negative
be clear on
 > the back, or should it have a greenish/grey haze to it?
 >
 > I'm using a paper rotary processor and processing for the
recommended
 > times. The negative seems to be processed properly,
pretty even, but
 > the areas of the neg where it should be clear aren't
because of the
 > back of the neg.
 >
 > Do you think because I am using a paper processor that
there is not
 > enough agitation on the back of the neg to clear it off?
 >
 > My main problem is that the negative won't print cyanotype
even after
 > being out side in bright sunlight for an hour!!
 >
 > Thanks
 >
It sounds like the solutions are not getting to the back
of the film. This is a common problem with some types of
drums. The haze is probably anti-halation dye. The dye is
normally decolorized by the developer but the fixer will
also decolorize it. Try refixing the film in a tray.
In fact, soaking it for a few minutes in a print developer,
like Dektol, will decolor the dye very effectively. This is
a good test since you won't have to wash the film for so
long as if you refix. Wash for about five minutes after the
developer treatment.
You may have to go to a routine of either fixing in a tray
or using a two bath fixer with the second fixer in a tray.
--

---
Richard Knoppow
Los Angeles, CA, USA
dickburk RemoveThis @ix.netcom.com<!-- ~MESSAGE_AFTER~ -->
 >> Stay informed about: 8x10 processing question, clearing back of film 

<wolvertone!!@yahoo.com> wrote in message
news:mm67kvck3msaf9breuk0jong7fbt2vrqcs@4ax.com...
 > I'm not using a JOBO, but my rotary processor has bidirectional
 > rotation.
 >
 > Steve
 >
 >

That still only moves the chemicals around the drum. Lifting the end of the
drum occasionally moves the chemicals length-wise as well. I use a Unicolor
motor base with bi-directional agitation and in general lift one end of the
drum every minute or so during processing to move the chemicals lengthwise.

Sherman
<a style='text-decoration: underline;' href="http://www.dunnamphoto.com" target="_blank">http://www.dunnamphoto.com</a><!-- ~MESSAGE_AFTER~ -->
 >> Stay informed about: 8x10 processing question, clearing back of film