I suppose this is a good time to point out that we don't have to be dependent on factories to produce old-style emulsion film. An exact duplication of a specific old film might be hard-to-impossible -- even for factories (lost secrets and ingredients), and sprocketed 35mm will certainly be a diy challenge, but many of the sumptuous characteristics of old emulsions can be re-created in the home darkroom. I just made a dozen 120 rolls for less than $10 in materials. I do have a darkroom and a couple of pieces of lab equipment, but the equipment cost came in at less money than my Pentax K7 set me back and I predict that silver nitrate will always cost less than Epson ink cartridges .