True in the sense that some people feel that lye is old fashioned, however, some people look for soap made without 'lye' lol and I think sodium hydroxide is better in that case (of course if they ask I will tell them what sodium hydroxide is lol). but saying 'lye' is not inci proper I don't think. I'm just doing the absolute legal route the whole way since I sell lotions and stuff too. Want to keep it all the same label format.