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hydrophobically treated glass for w/o emulsion
Hello everyone, I’ve been reading this forum for years and can’t express how useful it has been for my career. I have a question regarding packaging for w/o emulsions. I recently read that w/o emulsions with high water content such as water-breaking (or water-drop) emulsions require a hydrophobically treated inner wall if using glass jars. It’s my understanding that typically, glass jars have a hydrophilic inner wall which is not ideal for these kinds of emulsions. However, I’m not clear on what is the reason for this requirement. Is instability expected to happen? and can this happen also in polypropylene? I do have seen a couple of my formulations gliding on the bottom of the beaker in a strange way and eventually pooling when transferred into glass jars, specifically in air pockets between the formulation and the glass wall. However, I’ve also seen this happening in polypropylene specimen cups.
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