curves with EXCEL to get time=f(dilution)

[le vrai rdu]

http://www.cyrillerabiller.net/photo%202009/rodinal%20trix%20400.xls

http://www.cyrillerabiller.net/photo%202009/D76%20trix%20400.xls

for rodinal and D76 for trix 400 isos

This will allow you to choose your personnal dilution :D