I mixed up some Agfa Neutol WA warm tone developer in the darkroom to make some prints before checking how much warmtone paper I had left. Silly me. I had a few sheets but not enough for the session so I started using my other paper which happend to be a cold toned paper. I wasn't too bothered about the images on the cold tone paper as I was experimenting with a few things and practicing dodging and burning techniques. Later in the session I started to use the warmtone paper for some portraits and it suddenly occurred to me that the coldtone paper chemistry might have an effect on the developer in the tray. Is this likely to be the case? Looking at the results the warmtone prints look slightly greener than usual but maybe it is my imagination. What do other people do with different toned developers - do you mix up different trays for each one depending on the different papers you will be using in a session? Any advice most gratefully received.