Hello, the formula that members ask for can be mixed together. Because every ingredient water soluble
How much do you need? Do I have to use heat?
I don't know. Members have checked the usage rate. each ingredient and mixing instructions from the website yet? The team would like to please members, please check such information from the web page. please
Does it have to include sunscreen packaging?
If the formula can be packaged in a light-proof packaging. It's better than transparent packaging. Because most cosmetic ingredients deteriorate faster when exposed to UV light.