Quote Originally Posted by edcculus View Post
The only other thing that could have happened is me changing the apeture. I intended to start with an f8, but I was focusing and positioning everything fully open. I very well could have printed the first few fully open, the stopped down to f8 later on thinking thats what I had been doing the whole time.
This seems more likely than attributing it to temperature change. A 5-10 times increase in exposure time is probably from an aperture error.
If you're printing in a cold room, start with your chems at the proper temperature, but place your trays in larger trays, which you can fill with warm/hot water to maintain the proper temperature. The warming water can be changed as it cools, and refilled to keep you at the proper temp.