Renato, my first Cibas were done with all powder packets - you've jogged my memory - maybe 1970 to 1975 or so. I also use the P-3 kits which I store cold (wine cellar). As both paper and chemistry age, I adjust the CC filters to compensate by using a matrix of CYM from 0 to 50 til I get a neutral grey. Then I tweak from there based on the individual chromes. Yes, I use old fashion plastic CC filters at 6 X6 inch size with a modified lamp house and halogen source. For 35 mm and up to 4X5 format.

The Ilfochromes still have an edge in definition and color saturation for me. They seem to jump out more.

Nate Potter, Austin TX.