QUOTE (repare-brise @ May 28 2009, 09:10 AM)

We go through a fair bit of ONR(well most Optimum products for that matter, great stuff) and when we start a new gallon, it's always a diffenet color than the one we are finishing, but the light effects the concentrate much less. As for distilled water we mix all our dilutions with Distilled water(except ONR) and all do get affected by light.
I was responding to the original poster's comments. If you mix ONR and water to create a spray QD or wash, it will start as light blue (ONR's color) and turn clear within a few days. I have not tried it yet but I have been told if you use distilled water it will stay light blue. My undiluted ONR sat on a shelf in the garage for over a year and it did not change significantly.