W wxz123 Member Joined Aug 7, 2009 Messages 22 Reaction score 1 Oct 7, 2009 #1 Does anyone knows how much zinc oxide I need ( % ?) to make a 30 SPF lotion? Thanks
Deda Well-Known Member Joined Apr 21, 2008 Messages 3,269 Reaction score 48 Oct 7, 2009 #2 Is your zinc micronized?
W wxz123 Member Joined Aug 7, 2009 Messages 22 Reaction score 1 Oct 7, 2009 #3 I am not sure what that means??
Deda Well-Known Member Joined Apr 21, 2008 Messages 3,269 Reaction score 48 Oct 7, 2009 #4 Different places sell different kinds of Zinc Oxide powder, micronized is a smaller crystal. You need less micronized zinc oxide than non-micronized.
Different places sell different kinds of Zinc Oxide powder, micronized is a smaller crystal. You need less micronized zinc oxide than non-micronized.
W wxz123 Member Joined Aug 7, 2009 Messages 22 Reaction score 1 Oct 7, 2009 #5 ok, than what if its micronized....how much should I use for 30 SPF?
Deda Well-Known Member Joined Apr 21, 2008 Messages 3,269 Reaction score 48 Oct 7, 2009 #6 Sorry, sick today - forgot to answer. Use 20% of micronized and 25% of non-micronized. (for homemade only - if you want to sell it you must comply with FDA drug monographs and have your formulas lab tested.)
Sorry, sick today - forgot to answer. Use 20% of micronized and 25% of non-micronized. (for homemade only - if you want to sell it you must comply with FDA drug monographs and have your formulas lab tested.)
W wxz123 Member Joined Aug 7, 2009 Messages 22 Reaction score 1 Oct 7, 2009 #7 No problem Do I really have to tested in lab before selling? i did not have a clue :roll:
Deda Well-Known Member Joined Apr 21, 2008 Messages 3,269 Reaction score 48 Oct 7, 2009 #8 Oh, yeah, SPF is a drug claim. Whole new ball game.
W wxz123 Member Joined Aug 7, 2009 Messages 22 Reaction score 1 Oct 7, 2009 #9 Do you know where I can test it?? I would really appreciate!!!
Deda Well-Known Member Joined Apr 21, 2008 Messages 3,269 Reaction score 48 Oct 7, 2009 #10 You need to start by doing some research at the FDA.
IanT Freemason, Maker, Father, Mover & Shaker Supporting Member Joined Jan 10, 2008 Messages 4,744 Reaction score 120 Location DeLand, FL Oct 7, 2009 #11 glad you posted this... Ill have to look into this as well