Have just taken the plunge and bought 5 liters of digibase C41 chemistry. Have used tetenals products up to now. As their product has separate bleach and fix, can I expect a change in quality? If so, in what qualities?
I've never used the Digibase, but the quality is definitely better (at least more consistent) with the Kodak C41 developer, the CPAC from Pakor bleach, and Kodak Fix over the Tetenal Blix. I think my earlier negatives were sometimes a bit muddier when using a Blix, but it could also be my imagination. But since I switch i haven't really experienced the issue again, so I'm staying away from Blix as long as I can.
I recently switched from Unicolor (which I've heard is identical to Tetenal) blix kits to the Rollei Digibase kit. I'm liking it so much better because I can mix up only as much volume as I need (I don't mean one-shot). If not used to exhaustion, the Unicolor developer would die on me after six weeks, and the same is true of the Digibase developer.
Also, blix is nasty, gassy, odorous stuff. The separate bleach and fix aren't nearly as bad!
I've been doing exactly that with Tetenal kits for years without problem. While their instructions don't mention or recommend against partial mixing, many here do it regularly.