I have searched trying to find microbial challenge protocols for products that are solids. Anyone know what testing techniques are used?
I am assuming it is probably a disc test on a petri plate, where a disc is created from the solid sample, but can't find any definitive information on this.
Chemist/Microbiologist formulating in the Organic & Naturals arena under ECOCert/Natural Products Assn/Whole Foods/National Organic Program guidelines focused skincare & haircare products.
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