We are a cosmetic manufacturer, and I learn from experience! For this reason, I appreciate the advice I receive on this forum. Thanks in advance!
We manufacture a BB Cream for a private client. The volume of the entire batch is 20-25gallons - per shade. They have 6 shades in their range.
We have gone through the steps initially to ensure the formula was stable and well preserved. Preservative Efficacy Tests and Preservative Challenge Tests were done by a third party.
When we batch the formula, our client suggests we perform micro testing BEFORE it's filled into packaging and again AFTER. I understand the reasoning for this (of course).
However, I just want to know if this is standard in the industry. Our problem, is that we have to store 150 gallons of bulk product while we wait for the micro test to come back from the lab - prior to filling. How do other labs do this???
Any advice would be appreciated. Thank you!