I am new to this forum, and I also arrive to late to this thread, but for what it is worth, when I cross C-41 films with B&W chemicals, there are three things (exp/dev/fix) that I do to get better negatives (look out! ... for me!!!):
Exp: I use the film 1 stop under box speed
Dev: between developer & fixer, I use one-shot povidona yodada (50% with water) - don't know those words in english -
Fixer: I double the estimated fixer time
In my opinion a stand (or semi) development will bring an excessive compensating effect, with very low contrast, though I must admit I've never did it.
Thank you for your help! Yes, this has been my experience too! My film came out very thin and washed out with low contrast, loss of shadow detail plus halo-effects, but the midtones were okay.
I will try your tips next time I plan to cross process.
I think not compensating for the EI by two stops under for the stand development is what ruined the film -because I have successfully cross processed Portra 160 before with the normal development process.
These are the scans alternating edited and the unedited -scanned in color:
Originally, I did 1:100 for 3 hours with 3x3 agitations, but next time I have film that's already shot at box speed, I will try a 1:50 solution for 1 hour with 1 or 2 agitations.
I think maybe increasing my developing dilution or decreasing my development time will help with the contrast and film density.
Side note: yes my developer is still new, I have only had it a couple months. I use it as a one shot (no reusing), and ive only done two or three rolls with the original bottle, so its still fresh.