Re: HIE processing, added density, turbulence and more..

[Jaap Los <imagefotografie@xxxxxx>]

Cor Breukel wrote:
> 
> 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
> 
I never had faith in the inverted method of developing films. In my
opinion you generate a lot of airbubbles and uneven development. Cor,
after your message I scrutinized all my IR negatives again and I must
say that I don't suffer from any increased density around the
sprockerholes. Also pinholes are very rare. As a matter of fact I
haven't got any development problems and when I'm following all the
discussions on this list about this matter I feel I'm a lucky man. My
main 'problem' ( not a real one) is finding suitable objects and how to
translate them into interesting and beautiful pictures. Although my
method of development is comprehensively described on my homepage I will
repeat it also here as follows:
1. developer XTOL 1+1 20 C/68F, measure exact quantities (ordinary
tapwater)and work clean
2. avoid temperature changes, no more than -1/+1 degree
3. I use an ordinary Patterson tank, one film at the time
4. after pouring in the developer I bang the tank on the table a few
times and gently agitate it forwards/backwards during the first 30
seconds
5. afterwards I gently agitate for 5 seconds at every 30 seonds interval
6. halfway I recheck the temperature. If this is 1 degree too much/too
low I adjust developing time by 1/2 minute for every degree difference.
7. stopbath
8. fixer
9 rinsing during 8 minutes
10. have very nice negatives!
Best regards,
Jaap Los
Alkmaar, The Netherlands

See also my Infrared Photography Homepage specially made for you with
lots of information and links to other sites.
at:   http://home.wxs.nl/~losjb/


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