I have a question regarding the usability of C-41 chemicals. I had mixed a batch of Unicolor C-41 development powder kit in distilled water back in late Nov 2019. I had stored the chemicals in a complete;y black bottles with all dirt squeezed out and in refrigerator. So, until February 2020 I had developed 7 or 8 rolls of film (Fuji Superia HQ 200, Xtra 400, Fujicolor 200 & Ultramax 400) in this mix until now.
The developer had turned from light yellowish to pink color now. I guess that from the film dye though I give them a prewash, mainly the fuji films. I tried a film strip test and the results are shown in picture below: 1- Film cut from roll, 2- Dropped in developer, 3- Dropped in Blix. I noticed there are some particles in the developer. Does it mean it's bad? Can I just vacuum filter it to remove the particles and keep using it? My Blix though seems to have no floating particles and is brownish red color. What is the longest duration you guys have used and store a C-41 kit? Oh and one thing I noticed is with a 4 piece of strip was that after dropping in developer for 4 mins and then in blix for 6.5 mins the film turned out green. I assume this is because the strip got exposed to light completely?
Since C-41 kits have started becoming pricey don't just want to throw it away if it's good. I might use this batch of chemicals only for non-important rolls since I wouldn't need to worry a lot in case something goes seriously wrong. What do you guys think? BTW can the exhausted chemicals be discarded down the drain or they require special handling?