Ingredients - Water - Sulfate Free Shampoo Base (ph.7) - กลีเซอรีน - Mild Preserved Eco™ -sodium chloride 1.If you want to adjust the ph value but don't have a meter, how many % of critic acid should be added to get ph5.5 2. Between Sulfate Free Shampoo Base and Sulfate Free No-Tear Shampoo Base, wh...