Quote Originally Posted by Rudeofus View Post

Mark's suggestion "just add some pH balanced AA to the mix right before using it" seems like the easiest method for overcoming this issue. It should work both with his dev and with Xtol.
One can calculate how much sodium ascorbate to add assuming all the oxygen in the air space is used up.
2C6H7O6Na.......................+ O2..........->2C6H5O6Na +2H20
Sodium ascorbate............ Oxygen.......... Sodium dehydroascorbate
2x198.1=396.2g................22.4L=107L air
When the container is opened, add 3.7g sodium ascorbate for each liter of air space above the developer.