Those dev. times were given to me by a friend :(posted 8393 days ago)APX 100 / Perceptol 1+3,
N: 20min. (ISO 50) N+1: 30 min (ISO 64) N+2: 40 min (ISO 125) N-1: 15 min (ISO 40) N-2: 13 min (ISO 32)
All times are for development at 20 degrees Celcius, agitation every 60 sec. Negative contrast good for printing on a condenser enlarger. Have to be adjusted if you use a dichroic or cold light head. This is a starting point, you have to conduct your own tests to find the right dev. times for yous system...