Hi Folks, I'd like to start again mordançage. The formula I had (and lost) asked for some 200 vol. H2O2. The formulas I found today ask for 40 volumes H2O2. How do I conver the volumes? From 200 and 135 to 40? Thanks in advance, Joao -------------- next part -------------- 55 (11) 9607.2106 jr at joaoribeiro.com www.joaoribeiro.com