PE - I work for a large company with DI taps everywhere who makes many and varied compounds (I'm no chemist and have limited specific knowledge myself) and many formulas specify not using DI water as certain things (colloidal silica is one I can think of as I write this) won't react without free ions to trigger needed reactions. Are you willing to illuminate me/others on this a bit? I've always had a curiosity about the mechanics of this. The synthetic viscosity improvers seem to have this common attribute to them as companies move to avoid certain silica in their products. Was this ever an issue with large scale emulsion manufacturing?