Wanted to bump this thread up to discuss...IFRA Certificates. I just noticed that for one of the FOs I used (teakwood-cardamon) the max usage rates for bar soap per the IFRA Certificate is 15% - while the Nature's Garden info says 5%. NG does state at times their max usage rates are lower than the IFRA Certificate. Scent is strong so wanted to check I did not go over...phew safe on that one.
For another FO - lime-cilantro, NG's info matches the IFRA Certificate....at 5% maximum usage. So...my gut instinct is that it may not be a good idea to go over the 5% for these FOs?
I was a little heavy handed with lime-cilantro owing to the fact that citrus tends to fade (juicy lemon at 5% faded in hours) so I upped it a bit. Now I'm realizing I went over the IFRA Certificate recommendation. I have .35 oz excess FO in a 3 lb batch... divided by 9 bars for a total of .038 oz excess FO for each bar.
Should I not use these bars?????