The considerable increase(s) in the cost of photographic materials is poised to become even more expensive. Thus, I wonder if it is possible to re-use prepared ( diluted ) selenium toner. Suppose one has made fresh toner at whatever dilution one wishes, and tones perhaps 10-15 prints. Could one pour the "used" toner into a brown plastic container and use the toner once again a week or two later-or even a day or two later? In essence, is there information that suggests that the toner "ages", becomes effete, or grows ineffective? The cost savings would be considerable if such diluted toner could be used again.