Raw Materials for Cosmetics & Toiletries
-Water & water soluble materials
-Emollients（潤膚劑）
-Surfactants（界面活性劑）
-Rheological modifiers & film formers（流變改性劑、成膜劑？）
-Cosmetic actives
-Colours & perfumes
-Protectants (preservatives, antioxidants)（防腐劑、抗氧化劑）
It is very difficult to adopt a universal classification
-Many raw materials cross boundaries between categories.
-Many raw materials are multi-functional.
