Cosmetics Formulation Development

Please ask me how to adjust the ph by using acid and alkali. What is the procedure for using it? Thank you very much.

To increase the acidity, use Citric Acid If you want to increase the alkaline use Triethanolamine 99% How to use : Try to click to read it. There are detailed instructions for use. The device you should have is กระดาษลิตมัส or machine วัดค่า pH Thank you.

Thank you very much

One more question, is to put these alkaline acids. In the last step when it's finished?

If doing it for the first time, it will be used to adjust the ph value in the formula. It must be put in the last step. to gradually adjust the ph value as we want. Thank you.

thank you very much

Ask for more information. Adjusting the ph value must be done before inserting. สารกันเสีย right?

Hello, you can adjust the pH after done, then add สารกันเสีย yes