I mixed up a batch of Eukobrom Saturday, but after reading that adding HC-110 can extend paper developer's life and help with the high values on the Covington site, I added about 3ml to the mix. After printing 10 5x7s, I put the chemical away. I printed again today, and got great results. The developer acted like fresh, and their was no change in tone. The times remained the same, so I'm inclined to think that a little HC-110 to my Eukobrom is a good thing. Usually, the developer is good for 1 session. Does anyone have any experience in this matter? Is this likely to be a fluke, or does the HC-110 actually preserve print developer for several days?