* Multiple components: Lipstick contains many different ingredients, including pigments, waxes, oils, emollients, and sometimes preservatives and fragrances.
* Variable composition: The exact proportions of these ingredients can vary depending on the brand, color, and type of lipstick. This means that even lipsticks of the same color from different brands may have slightly different compositions.
* Physical separation: The ingredients in lipstick can be physically separated. For example, the waxes can be melted out, leaving behind the pigments and other components.
Because lipstick is made up of multiple substances that can be separated and have varying proportions, it fits the definition of a mixture rather than a pure substance.