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Why does cream loses 15% water after 2 weeks?
Hi everyone,I am making cream with the following formula:- Water: ~90%- GELMAKER: 4%- Polysorbate 80: 1%- Lanolin and active ingredients: 4%- Pigments: 0.1%- Prevasertive: 1%Everything is ok. But after 2 weeks, the weight of the cream -> lost more than 15%.May I know what causing this issue? What should I do to fix this problem?
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13 Replies
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I’m guessing that it is not enough humectant and also depends on your packaging?
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Likelihood to be water evaporation. So you can think about what TheSocksTooBig has mentioned.
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TheSocksTooBig, jemolian, thanks for your advice.
I avoid using humectants b/c when applied to skin, they draw water from the inside skin, not water from the air. and my case is not allowed to use them.
Do you know of other ways to avoid evaporation without using a humectants?
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You can opt to use milder humectants if you can’t use the more water retaining types.
If not put the formula in a airless pump bottle or jar, squeeze the bottom lever or stopper to reduce the head space. At least with it, the moisture won’t go anywhere.
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@jemolian I have tried with propylene glycol and glycerin. But fail.Can you recommend some milder humectants?
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Perhaps you can try betaine or sorbitol if you are looking for milder ones.
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@jemolian, i will test again. thanks a lot for your helpful suggestions!
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What type of packaging are you using?
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@Perry I am using plastic jar
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Losing 15% (even without humectants) is a large amount. How did you determine that amount? But the packaging could be a significant problem. Unless it’s an open jar there is no reason you should be losing that much water in such a short amount of time.
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Thanks @Perry , that might be one of the reasons.I check the weight every day, and jars are only lightly screwed, not closed.And maybe to make the bigger problem that the temperature in my country is very hot, at noon is usually 32-35 degrees Celsius.
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andync said:Thanks @Perry , that might be one of the reasons.I check the weight every day, and jars are only lightly screwed, not closed.And maybe to make the bigger problem that the temperature in my country is very hot, at noon is usually 32-35 degrees Celsius.Water evaporation isn’t it nature of hydrogel in open jar?
May I know why didn’t you close your jar?
Even alcohol gel sanitizer won’t evaporate in proper tube/packaging. -
If you have an open jar at elevated temperatures, you’re going to have a difficult time preventing evaporation (even with humectants).
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