6907.23.10 - Unglazed

This classification pertains to ceramic flags, paving, hearth, and wall tiles that are *unglazed*. These items are specifically characterized by their unglazed surface and a water absorption coefficient by weight that exceeds 10 percent. This indicates a porous ceramic body, commonly found in tiles intended for applications where breathability or a natural finish is desired, such as certain types of flooring, outdoor paving, or decorative wall treatments.

It is crucial to distinguish this category from its sibling, "Glazed," which would cover similar ceramic tiles possessing a vitreous or glassy coating. The absence of this glaze is the defining characteristic here, setting it apart from tiles that are coated for aesthetic or functional purposes like stain resistance or ease of cleaning. The focus remains on the inherent properties of the ceramic material itself and its unadorned surface.

Within this "Of a water absorption coefficient by weight exceeding 10 percent" classification, further subdivisions are made to refine the classification of these unglazed tiles. These subcategories allow for a more precise identification based on specific physical attributes, such as the size and shape of the individual tiles, or for a general category for other unglazed tiles that do not meet the criteria for more specific groupings. This granular approach ensures accurate duty assessment and trade statistics.