HIE processing, added density, turbulence and more..

[Cor Breukel <cor@xxxxxxxxxxxxxxxxxxxxxxxxxxx>]

An recurring problem I encounter (next to "emulsion artefacts"), is added
density around the sprocket holes (black on the negative, white in print).
Presumably due to the turbulence around these holes during development.
Changing my manual rotation method (only a gentil 90 deg tilt, with a
slight rotation every 30 sec), helped quite a bit, but didn't completly
solve it. Lately I aquired a second hand JOBO processor, a treat! So I
decided to use it also for HIE. This time no "sprocet-hole pattern", but a
slight added density all over the whole film strip, of about 1mm
thickness, bottom and top of the (horizontal) frame. Still no solution,
still turbulence I assume, and with some darkroom effort removable. I
could lower the rotation speed next time.

Any thougths, experiences, feedback etc on this ?

Thanks,

Cor Breukel

http://ruly70.medfac.leidenuniv.nl/~cor/cor.html
"The Infrared Gallery"
http://ruly70.medfac.leidenuniv.nl/~cor/ir-gallery.html


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