BIG GIANT NO-NO. Please be careful. You are going to end up with people complaining of red, burning skin, possibly even people feeling physically ill and your bottles will start to be eaten away & disintegrate & possibly ruin someones pocket book, or worse. I understand your continiuing to do research, but that one post you remember seeing of a person using 100% FO is probably the only one you'll find & I'm sure that person must've gotten alot of feedback on that. I know I've seen etailers selling perfumes & dry oil sprays, claiming to use 50% FO & I was always told that THAT was too much! I guess you can make up a bunch in all your different scents & test them on yourself for a few weeks & see what happens. Then, again in a few months & see what happens to your skin & the bottles themselves. If you have no problems, I guess, then you can go on to your testers & see what happens to them. But honestlly, I've always read that 100% FO load is a huge no-no & can cause some serious damage. I wanted to know about going up to 50% because I wanted to make nice, strong, long lasting body sprays, but after researching & testing, I stick to my standard ratios & percents. But it can't hurt to continue asking, I totally understand that.:smiley2: