The colour of the 131 changes as a session goes on, more than other papers I've tried.
Here's the last photo from yesterday's printing session. I had started with about 6-7 minutes in the developer. By the time I got to this one, developing time was up to 35 minutes. I must say, the colour was a surprise. Usually the tones at this point are quite peachy/salmony. I've never had this colour before - someone dropped a few raspberries into the punch this time.