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I want to know if the ingredients are suitable or not. Where to add to prevent deterioration? or retention? For example, protect Antioxidant in formula or other 2. Mixing method Mix all the base and water components together. then gradually add Sebum-Reg , AcneBee , SelectSorb which is the powder at...

pH 5.5-6.0. The packaging is transparent. Can I still use it? currently in color น้ำตาลเข้ม

The product changes color from light yellow to darker and darker. until brown 1. I want to know what is the cause. which ingredient, สารกันเสีย not enough or other factors. 2. Can I still use it? 3. What should be improved next time? Actual production 300g. The formula is as shown in the attached fi...

Is there a way to know if the ingredients are successful? consists of small components For example, SKIN-DEFENSE® V ลดระคายเคืองจากธรรมชาติ in the ratio of 100% contains sub-components such as Helianthus Annuus Seed Oil ,Cardiospermum Halicacabum Flower/Leaf/Vine Extract , Tocopherol how many % each?

1. Adding a penetration enchanter like Phospholipid is it necessary to reduce the active ingredients? If so, how many % should be reduced? 2. Poloxamer 407 soluble information But try to put it with plain water. The coagulation is not dissolved, what should I do?

thank you very much It is expected that only Mild Preserved Eco 1% + Thyme Kill 0.05% I'll let you know the composition of the formula again. Usually put this Mild Preserved Eco 1% + Thyme Kill 0.05% Should it be covered? and the average age If you put this estimate Approximately how long will it be...

To do the challenge test 1) Where and how? 2) Is there a manual method/kit? 3) If using สารกันเสีย challenge test eg Mild Preserved Eco , Thyme Kill is enough to validate the result without having to do another challenge test?