[HenryLee]

Dear Ketchito,

Previous practice when I make a O/W emulsion, I would check the product pH. Then, I will take 10% of the product and mix in 90% DH20 to check for product pH. The solution purpose is check for the product pH. My concern is, it is possible that I use O/W emulsifier, and the product come out with W/O emulsion.