usually what types of skin care products you'll NOT add any preservative at all? and what types of skin care products you'll add some preservatives to make the expiry date longer?
new1 發表於 2011-10-3 13:14
usually what types of skin care products you'll NOT add any preservative at all? and what types o ...
sorry that I don't understand your queries. I didn't have experience in mixing natural ingredients with skin care products. Or what is the meaning of skin care products you mentioned?