Subject: HC-110(posted 8906 days ago)I am developing tri-x and tmax fills (not together ;), using HC-110. I have a couple of questions. First, although I ordinarily use 120, i do have a 220 back and recently have developed 2 rolls of 220 using the same process. Do I need to increae the potency of the developer solution (or development time) since there is more film surface area? If so, is there some way to figure out by how much other than trial and error. Also, I have been mixing one part HC-110 to 28 parts water, and not using a stock solution. It seems to work fine for me, but I'm really just a beginner. Is there any reason that I may be overlooking that this is not a good idea? Seems to me like it would yield more control not less (assuming accurate measurement of 1 oz., which isn't too hard with the right tool) gien that i start each time with fresh HC-110 and not a stock that has been sitting around for some months.
Last, does anyone know where I can find the characteristic curves of most black and white films. I am looking for a single source, and maybe even one that compares the curves to one another and explains what the difference in result theoretically should be. In my experience, these curves don't come with the film and I couldn't find such a book at B&H.