The presence of copper as an in-can preservative and encapsulated oxides indicates a vulnerability to biological spoilage and chemical instability in liquid formulations. Preventing premature degradation ensures product shelf-life and maintains aesthetic integrity.

Low reflectivity of dark or metallic surfaces at specific wavelengths causes sensor detection failure. Increasing off-specular intensity ensures object visibility for autonomous navigation systems.

Thin metallic platelets often suffer from chemical degradation or physical aggregation which destroys optical consistency. Maintaining high reflectivity and color purity in diverse media is the primary technical bottleneck.