Phil makes awesome pigments. I've been tattooing for 19 years and have used his colors most of my career and have seen how they weather the years. I know our Health Board was questioning my bottles because Phil doesn't label bottles with lot numbers or produce dates but they allowed me to still keep them in service if I had my order receipt showing when they were purchased and I make my pigment log sheet with the "purchase date" instead of a lot number. Not sure if other agencies would accept that though. I flat out refused to give up my Unique pigments...they are that good!