Hi, Honey, and thank you for the reply. If cosmetic glitter doesn't dissolve, and 'cake decoration' glitter doesn't dissolve, and neither are toxic, surely there's no significant difference? The stuff sold for use in soap is called 'Mica', but the MSDS's for it states that it's polyethylene with a bit of aluminium thrown in ... real 'Mica' is a naturally occurring mineral, which isn't made of plastic with a trace of aluminium! My assessment sheets only have 'Mica' listed .... no other definition or qualification (and the last thing you'd want to use in soap is Real Mica)s so ... gut feeling is that the stuff sold for cake decoration is pretty much the same as the cosmetic glitter. Plastics won't break down in the digestive tract, but aren't toxic (by definition). Glitter/mica in soap isn't eaten (unless you're truly sad - and I did have a great-aunt who allegedly drank ink, but that's another story entirely.) I can't find any MSDS sheets (why?) for the cake decoration stuff ... I'll certainly contact my assessor to ask the question, but I'm more cross about the non-edibility of stuff I was sold years ago, on the understanding that it was 'edible glitter' than anything else! Dear God ... have I poisoned my entire family ... ?!!!