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Queries about cream formulation
Dear all,
I’m very new to doing O/W topical face cream formulations, and am wondering about a few things. I heard from another formulator that the emulsion should be left to settle and age a bit after it has been made before doing any analyses on it - particle size measurements, and accelerated temperature testing. My question is - how long should I leave it to settle and age after making it please? Does this vary from emulsion to emulsion depending on what is in the formulation and if so, what should I be looking at to help me decide how long to age the emulsion before bringing it forward for further testing? Thanking you in advance for the guidance!
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7 Replies
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Not sure about actual production, but in DIY you set it off with open lid for a night to cool down and gain final viscosity
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Thanks for sharing! Does it need to be in some kind of sterile chamber like a laminar flow while cooling overnight with the top off like that?
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It really depends on your Formulation, but it’s not a hard fast rule that you have to wait. There is a recent discussion you can refer to about post-manufacturing and viscosity. It is very much Formula dependent.
In production, I have generally seen the product placed in “QC Hold” post-manufacturing. It is in a sanitized container. This hold allows Micro to get back and for the batch to meet the specs as defined.
I would not leave it out overnight with the lid off. We don’t use laminar flow hoods in Cosmetics.
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Ok, thank you so much for sharing!
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Leaving the emulsion out o/n in a closed container is usually good for equilibrium prior to testing/stability
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thanks for sharing!
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You are most welcome Good luck
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