3207 - Prepared pigments, prepared opacifiers and prepared colors, vitrifiable enamels and glazes, engobes (slips), liquid lustres and similar preparations, of a kind used in the ceramic, enamelling or glass industry; glass frit and other glass, in the form of powder, granules or flakes:

This HTS category, 3207, encompasses a range of specialized materials used in the ceramic, enamelling, and glass industries. It specifically covers prepared pigments, opacifiers, and colors that are formulated for these applications. Additionally, it includes vitrifiable enamels, glazes, and engobes (slips), which are essential for creating decorative and functional surfaces on ceramics and other materials. Liquid lustres and similar preparations, often used for metallic or iridescent finishes, also fall under this heading.

It is important to distinguish these prepared materials from raw pigments, dyes, or colorants that may not be specifically formulated for vitrification or have a defined industrial application within the ceramic, enamelling, or glass sectors. Unlike general paints or varnishes classified elsewhere, the products in 3207 are characterized by their ability to undergo high-temperature firing processes to become integrated into the substrate or form a durable, glassy layer.

The subcategories within 3207 further refine the classification based on the specific type of preparation. 3207.10 focuses on prepared pigments, opacifiers, and colors. 3207.20 covers vitrifiable enamels, glazes, and engobes, highlighting their glassy nature and application in surface finishing. 3207.30 specifically addresses liquid lustres and similar preparations, often characterized by their metallic or iridescent properties. Finally, 3207.40 deals with glass frit and other glass in particulate form, which serve as raw materials for glazes and enamels.