USP 51 vs ISO 11930 test?
Can anyone provide insight into which PET is suitable or better for body products, specifically body wash and O/W body lotion? I’m not sure whether I should choose the USP 51 test or the ISO 11930 test and from my readings the tests appear to be the same. I can’t really base it on my location because there’s no regulatory requirements when it comes to these things where I live and I don’t want to choose the cheaper test just because it’s cheaper. Any insight or advice is very much appreciated.