ok I'm gonna be trying this old azo out that I have, but don't know how long I should expose it. I hear it is suposed to be somewhat slower than regular enlarging papers. I'm going to have to make a test strip of course, but I don't want to make one that gives too little exposure for every step. I have to make the steps by hand since i have no step wedge. I have a limited number of sheets, and just don't want to make a test strip that turns out to be useless. So if it usually takes a 20 second exposure to yeild a proper print on regular enlarging paper, about what time should I start with for the azo? Thanks for any suggestions you can give. BTW my light source is from my enlarger which is about a meter above the baseboard.