Contains water-soluble ingredients like distilled water, aloe vera, and humectants (e.g., glycerin).
Reserved for heat-sensitive "active" ingredients, such as vitamins, preservatives, and fragrances, added once the mixture drops below ) to preserve their properties. Key ingredients are categorized by their function:
Comprises carrier oils, butters (e.g., shea, cocoa), and emulsifiers that require heating to melt and blend.