Quote Originally Posted by drpsilver View Post
I had forgotten about the possibility of carbonate and hydroxide precipitation.
Please note that this will not just be a possibility, but a big certainty. Most devs work only in caustic environments with pH levels above 8 or 9, and at these levels you will inevitably get Ca(OH)2 precipitation, regardless of which caustic you used to raise the pH.

In theory, you could chelate away the calcium with EDTA, but the required amount of EDTA will be much more expensive than fresh ascorbic acid. If you still want to play with ascorbate developers, look at Mark Overton's (aka albada) recent thread. Lots of info to be found ...