I contacted Bluegrass. They allowed as how they sell certain photo products to Calumet. I searched Calumet's site and found they sell "Zone VI" chemistry--paper & film developers, fix, hypo clearing agent. The film developer is described as: "Liquid concentrate to develop 32 rolls of 36 exp. 35mm film or 120 sheets of 4x5 film. Achieves maximum resolution from Agfa-Pan and other slow, thin- emulsion films." I don't think it is Harvey's.(posted 8317 days ago)