I suppose since I am asking others to share their agitation schemes and thoughts for Thorton's Two Bath the least I could do is write out and share how I am currently doing things.
I set up a 1 liter measuring cup almost filled with distilled water and one drop of LFN wetting agent - Bath A solution is in a two (120) reel tank filled just over halfway (600ml) - Bath B solution is in a two reel tank filled just over halfway (600ml) - a 1 liter measuring cup filled with tap water for a quick water stop - then another 1 liter measuring cup with fixer.
My film is loaded on a Hewes reel with a stainless lifting rod, processing one roll at a time. I pre-soak for 2 minutes and let drip for 30 seconds.
I then start Bath A with 1 minute of agitation. Agitation is done by lifting the rod up so the top of the reel meets the top of the tank and then setting it back down. After 3 up and downs I rotate the tank a few degrees. After the first minute I repeat with 3 up and down motions every 30seconds followed each time by another slight rotation of the tank.
I let it drip for 15 seconds.
I then start Bath B with 15 seconds of agitation. Agitation is done in the same style as Bath A except that I agitate only at the top of each minute instead of every 30 seconds.
I let it drip for 15 seconds and then 15 seconds in the water stop with agitation the entire time, again by lifting the reel out of the solution and setting it back in.
From there I go into the fixer.
I plan to do some testing with less agitation in bath A (and using a bath B with less Sodium Metaborate) for more extreme N- situations but have not yet done so.
Last edited by Shawn Dougherty; 08-19-2013 at 05:57 PM. Click to view previous post history.