Please answer as far as you know.
1. Increase the amount of Satin Cream Maker ™, it may be increased to 3-5%, if it is too thick, reduce the amount to get the desired texture.
2. Try to notice that the substance used is red. As far as I can see roughly from the formula, it seems to be Astaxanthin , try reducing the amount to 0.1-0.3%.
Here are some questions about pH adjustment:
1. To put a buffer to adjust the product pH and want the pH of the product to be Stable, do I have to add both acid and salt of the acid? For example, put both Citric Acid - Sodium citrate or add only Sodium Citate if adding both. Approximately what is the ratio?
2. I would like to know if the product has reached the desired final pH such as pH 5.5, is it necessary to add a buffer such as sodium citrate or HEPES again? (out of the pH range of 5.5)
3. What step should I put buffer in? For example, put in the last step. Enter steps after adding Active, etc.
4. Do cosmetics need to contain buffers in every formula?
thank you
