Guest guest Posted November 10, 2003 Report Share Posted November 10, 2003 On Mon, 10 Nov 2003 07:20:24 -0800, / Eleanor Dayton wrote: >I have a question: How do you figure weight if one of your ingredients is powder and the rest are water and oil? Powders, waxes, oils, butters are BEST weighed out. >Example: I want to make 10 oz. of cream with 2% Allantoin in it. 10 oz = 98% X oz = 2% (2% X 10 oz)/98 oz 20/98 = ~ .204 oz =~ 5.78 grams. Getting 2% Allantoin into a product is not easy. quoting from the literature Formulating With Allantoin Allantoin is compatible with most ingredients used in personal care formulations. Water solubility at monograph-approved levels is an issue. Suspending the material in a thick base is the best way to resolve this issue. When conducting stability testing, care must be taken to look for Allantoin recrystallization. • Incorporation To incorporate 0.5% Allantoin, or more, into an emulsion product, the emulsion is made and Allantoin is added during the cooling process below 50 øC. Good agitation is required to thoroughly disperse the Allantoin to achieve a suitable suspension. Addition of Allantoin at 0.5% or more or at temperatures above 50 øC in aqueous systems can cause solubilization and recrystallization upon cooling into larger particles which are perceptible during product use. • Use levels Recommended use levels: 0.5 - 2.0% Solubility data Water 0.45g / 100 g Ethanol <0.1g / 100 g Methanol <0.1g / 100 g Propylene Glycol <0.1g / 100 g Lab Rat -------------------------------------------------------- Maurice O. Hevey Convergent Cosmetics, Inc. http://www.ConvergentCosmetics.com ------------------------------------------------------- Quote Link to comment Share on other sites More sharing options...
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