I'm new to your forum; I just discover it few weeks ago and find it very
interesting for a newbie in Darkroom process.

I have seen in a previous topic "Determining contrast grade in the Darkroom" that some people consider that the exposure time stay the same as you change contrast grade. I'm surprise by this affirmation and I would like
to know if some of you have realize a calibration of their system like
define by Paul Butzi in is web site.


Excuse me for my poor english.

Best regards,