The specifications for lipstick raw materials are typically defined across three dimensions-physical, chemical, and application-related-to ensure formula stability and product consistency.
Physical Specifications
These primarily encompass particle size, melting point, viscosity, and physical appearance. Colorants and powders typically require a uniform particle size distribution to prevent coarse particles from compromising the product's fine texture; waxes must possess a defined melting point range to ensure stable melting during processing while maintaining structural integrity at room temperature; and oils and fats require controlled viscosity to influence the lipstick's smoothness and spreadability.
Chemical Specifications
The focus here lies on purity, stability, and safety. For instance, inorganic colorants such as iron oxides and titanium dioxide must comply with regulatory limits for heavy metals, while organic color pigments must pass relevant safety certifications. Oils and fats must exhibit low acid values and low peroxide values to prevent oxidative degradation; furthermore, the entire raw material system should possess robust antioxidant capabilities and chemical stability to prevent discoloration or the development of off-odors during storage.
Application Specifications
These emphasize compatibility with the specific formulation system, covering aspects such as dispersibility, compatibility, and film-forming properties. High-quality raw materials should disperse uniformly within the oil-and-wax matrix without settling or agglomerating, while remaining fully compatible with other ingredients so as not to compromise the final lipstick's color payoff, gloss, or longevity. Different product positioning-such as matte, moisturizing, or high-gloss finishes-places varying emphasis on specific raw material specifications, thereby enabling the creation of differentiated product effects.