I've moved my darkroom and haven't unpacked all of the B&W gear at this time - don't have access to the MCM data sheet to give you the information. I suggest emailing Photographer's Formulary, they will give you the data sheet info & you can make up your mind as to dilution vs film speed recommendations. I shoot mostly color at this time, so I don't keep the data memorized - I check the MCM data sheet prior to going out to shoot. Film speeds given are accurate and I've never had any reason to change from recommended speeds.(posted 8772 days ago)