I use APX100 at 100 asa developed in rodinal 1+60 for 15 minutes at 20°C. This gives very good results with my condenser enlarger (focomat 1c). This can be compared to 12,5 minutes in Rodinal 1+50. APX100 (35mm) in rodinal 1+60, 15 minutes gave a zone V density of 0,61(posted 8633 days ago)