Prepared Pigments, Opacifiers & Colors for Ceramics

Heading 320710 covers preparations specifically formulated for use in ceramics, enamels, or glass — typically characterized by their ability to withstand kiln temperatures and their formulation with fluxes or carriers suited to ceramic application. A general-purpose pigment preparation not specifically designed for ceramic firing would classify under 320649. Technical data sheets specifying the intended ceramic or glass application are key supporting documents.

Standard commercial entry documentation applies. However, if the preparation contains regulated heavy metals (such as lead or cadmium compounds used in some traditional ceramic colorants), importers should assess TSCA certification requirements and any applicable state-level restrictions. A licensed customs broker can advise on whether the specific formulation triggers additional compliance steps.