Disons que les effets si specifiques au Rodinal devraient s'annuler a cause de l'agitation continue pendant aussi longtemps : on perds ainsi l'effet compensateur (du a l'epuisement de la chimie localement) ainsi que l'acutance
Voila pour la (soi disant) theorie.
Un mail de JOBO USA concernant l'utilisation du Rodinal en rotatif :
From: Ken Owen [SMTP:keno@jobo-usa.com]
Sent: Monday, May 13, 2002 2:29 PM
To: 'Albert Martinez'
Subject: RE: Sharpness Loss From Constant Agitation...
If you are referring to the "edge" effect associated with compensating
developers, then yes, constant agitation will interfere with that. Those
developers depend on exhausted solution staying where it is, and rotary
agitation would definitely keep it moving. However, in terms of actual
sharpness, there is no documentation that shows any loss of sharpness due
to rotary processing. That would be somewhat akin to dropping the film and
worrying about knocking it out of focus. (That's an old joke!)
In fact, there may be some scientific research that shows improved
sharpness in rotary processing. About 15-20 years ago, a medical research
department at the University of Rochester, determined that for the purposes of
micro-densitometry of x-ray films, they were better able to measure the
results from rotary processing than from other methods of automated
processing. (I believe the primary alternative was a roller-transport
processor.)
We have not received any significant quantity of complaints concerning
sharpness due to processing, therefore we have had no reason to pursue it
any further.
Ken Owen
Keno@jobo-usa.com
www.jobo-usa.com