theHUN wrote: James Markus wrote: theHUN wrote:
Roll 192: I got curious about CHS 100 II, so I bought a few rolls and measured the film speed using Rodinal, 1+75, 12', constant rotary development.
I get ISO 50, which is what I was expecting. I also get a bunch of curling which means I'll never shoot this film again.
How do you dry your film?
I hang it in the shower with a 100 g weight hanging from the bottom of the roll. A water distiller is creating a warm and humid environment. This method consistently gives flat negatives for FP4 and HP5, slight curling for Acros, and comically massive curling for Rollei IR400.
I own some of those weighted clips, but I never use them anymore. My theory is that they create tension in the emulsion that cause curling. About 35 years ago I began this method for super flat film. I use super light weight stainless steel clips.. After photo-flo and one squeegee wipe I hang for about 8-10 minutes. I remove the bottom clip and reverse roll the film back onto a dry stainless reel emulsion side out (opposite from development.) I made a dryer out of a hair blow dry hair dryer, and shop vac reducer, and a 4.5" PVC pipe about 18 inches long. One removable crosswise doll rod to keep it in the pipe, and mounted it to the wall. The drier is set to the lowest heat setting, and slowest FPS air flow. (it feels slightly warm). After 5-10 minutes I remove the reel and lay it on a piece of plywood to slow the return to room temp. Another ten minutes I take it off the reel and lay the film on edge on a formica counter in approximately a 10 inch circle. (This is to straighten the inner most end of the film) By the time I scan or cut strips the film lies perfectly flat. No cupping, and only occasionally the inner most end retains a bit of longitudinal curl that the archive sheet and being nested in a book finish off. Like I said - It's a thory, but the above works for me.
Sep 27, 2025 at 08:35 PM
Previous versions of James Markus's message #16898233 « Post your recent film shots! »
