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“Frosty” patch on the surface of anhydrous ointment
Hi all, I am facing a situation here the surface of this anhydrous ointment look patchy/frosty after letting cool down at room temperature. I found out this appearance is more apparent when I dispense it in a wide surface container. Appreciate if anyone can tell me if the same issue has happened before and how to solve it.
Formula:
Petroleum jelly 85.7% w/w
Fully refined paraffin wax 0.33% w/w
Stearic acid 5% w/w
Liquid paraffin 2.49% w/w
Menthol 3.34% w/w
Eucalyptus oil 3.14% w/w
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6 Replies
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Does this happen if you leave out menthol?
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Yes, it does still
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dose it happen if you put a cling film over the surface of your product while cooling down? (really on the surface directly not over the Conntainer it self )
Maybe it absorbs a little bit o water from the surrounding air if humidity is high that can lead to a cloudy fog-like appearance but only in the top area of the product.
best wishes
Tobias
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Thanks. I will try that. I am living in a hot humid country so this could be the problem
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I would lower the amount of menthol and petro jelly. Why are you using that? There are other items to use than that.
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It is cost related issue. I am making a mild analgesic ointment, the menthol is added to add a cooling sensation. May I know which ingredient will you suggest to replace the petroleum jelly if I reduce it? Thank you
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