Funny thing I had 39 rolls of 120 developen in the same workingsoulution of 1 litre. It was not so very old. Just a week or so. And on a shoot for a magasine cover i used Portra 160 NC as usual. Since i used modifed light set-up, i did shoot a test roll and developed it in the old chemistry. The other 6-8 rolls i developed in fresh developer. After seeing the cointactsheets, 1: there where no difference in colour, exposure quality and the frame tha was best suited for the cover, was on the testroll

Magazine cover attached