Hello All, I have a question regarding a Borax solution I recently mixed. This was for part 2 of a split development for B&W (the first part was Microdol-X). The second part was the Borax solution which was simply 20 grams of Borax per litre of tap water. The tap water was first filtered with a domestic water filter, then boiled (and allowed to cool) to reduce hardness, then used for mixing (this is my normal proceedure). The Borax dissolves easilly, but each time I have done this, a few hours afterwards, a white precipitate appears in suspension, which looks like snow, or teased-out cotton wool. I tried storing the solution in both HDPE and glass bottles, with the same result. I have not managed to get the precipitation to re-disolve. I have no idea what it is or why it has formed (other impurities in the water/Borax powder?) If I use the solution before the precipitation forms then it works fine and the negatives are good. I have not tried developing a film with a solution showing the precipitation! Any comments on this would be appreciated.