Tetenal C-41, coloured spots on film..???

[Bertil]

I agree Rudeofus "something is rotten in the state of stabilizer"!
According to Tetenals homsite, the C-41 stabilizer should contain something like:
Alcohols, C12-15, ethoxylated
Hexametylentetramin
1,2-benzisotiazol-3(2H)-on
Unfortunately, my knowledge in chemestry is not enough to have an opinion on the matter; the only thing I can have made wrong, as far as I can see, is my water, though "my water" is supposed to be the best tasting water in the north of Sweden, BUT tasting good in not the same as "good water for C-41".
Sounds nice that Tetenal is communicative even if it take some time. I will let you hear what they have to say. Waiting for their response I will do some B/W work!
/Bertil

[Rudeofus]

Unfortunately, my knowledge in chemestry is not enough to have an opinion on the matter; the only thing I can have made wrong, as far as I can see, is my water, though "my water" is supposed to be the best tasting water in the north of Sweden, BUT tasting good in not the same as "good water for C-41".

I can't exactly claim to know what these chemicals are supposed to do, but your remark with the water rang a bell: you are aware that there should be absolutely no wash step after the stabilizer. For this reason I always use deionized water for mixing the stabilizer bath to make sure that I don't end up with water residues on my film after drying. It would be interesting to measure the pH value of your stabilizer bath before and after stabilizing a roll of film.

[Bertil]

Long time ago!!
Never got any comment, any explanation, from Tetenal, gave up!
Anyhow, when I started to filter the stabilizer after each run (ordinary coffee filter!), or before a new run, I have no problems of the kind that started this thread. Very Good – end of story!

Quite another thing: some time ago I had another problem with C-41, my Jobo CPE-2, running with tank 2553 and 120-film at 38° C (100°F) at 3'15", and at the fast speed #2. No doubt the edges of the 120 film was, compared to the center, overdeveloped – thus uneven development (hate that kind of shit).
Now, still using Tetanal C-41, I run at the other recommended temperature, 30°C (86°F) at 8 min, with the lower speed, #1, and each minute I loosen the tank and agitate the ordinary way for some minutes, up and down and so fort. In my judgment the result is quite OK perhaps even good! (well, I don't make analog prints from my negs, just scan and print the digital way – have never liked colour prints, save some "dye-transfer prints" by among others Irving Penn!!

Best regards

/Bertil