Interessante articolo sul pre-lavaggio delle pellicole, qui sotto riporto solo le conclusioni e il link all'articolo stesso: "Conclusion: while this is not a definitive and exhaustive test it does show that there is a difference between with and without pre-soak. Those without seem to give a denser negative, which suggests that the pre-soak does have a diluting effect on the developer albeit small. This may be offset by the developer holding its temperature better because the pre-soak is building heat into the tank which helps maintain the developer temperature. This should help to improve consistency between films."
http://www.film-and-darkroom-user.org.uk/forum/showthread.php?t=202