Quote Originally Posted by MattKing View Post

Are aware whether any research work has been done with a goal of developing such tests? Not just for X-Tol, but for other chemicals as well (e.g. E6 and C41). It seems to me that in the current circumstances, such tests would be much more likely to be commercially valuable than when volumes were higher.
High-volume users have good data already on total development capacity. They don't need to test the chemistry; they can simply replenish or discard based on the amount of film processed in the chemical.

If you need a developer that will work well after years of storage, XTOL is not your developer, unfortunately.