Common blue clay and other ball clays
Other clays (not including expanded clays of heading 68.06), andalusite, kyanite and sillimanite, whether or not calcined; mullite; chamotte or dinas earths. > Other clays > Common blue clay and other ball clays
Duty Rate (from China)
Products classified under Tariff item 2508.40.00.10
Attapulgite Clay Granules
Granular attapulgite clay in its natural, non-expanded state, used as a suspension agent in pesticides and drilling fluids. It is a natural clay that has not been subjected to processing beyond crushing or grinding, aligning with the scope of heading 25.08.
2508.40.00Ball Clay for Ceramics
High-plasticity ball clay mined for use in fine porcelain and sanitaryware production. As a natural, unexpanded clay, it falls under 'other clays' in heading 25.08, not being a kaolin or fire clay.
2508.40.00Bentonite Clay Lumps
Natural bentonite clay in lump form, valued for its swelling properties in drilling muds, cat litter, and sealants. It is a natural clay that has not been expanded or processed beyond mechanical means, fitting the scope of 'other clays'.
2508.40.00Blue Ridge Ball Clay
Blue Ridge ball clay from Georgia deposits provides medium plasticity for tile bodies and engobes, with good suspension properties. It is a natural, uncalcined ball clay, falling under 'other clays'.
2508.40.00Carolina Ball Clay
Carolina ball clay from North Carolina is valued for electrical porcelain insulators due to its high fired strength and low electrical conductivity. It is uncalcined and natural, falling under 'other clays'.
2508.40.00Common Brick Clay
Surface-mined common clay suitable for traditional brick and tile production. It is raw and uncalcined, falling under 'other clays' as a natural clay not otherwise specified.
2508.40.00Devon Ball Clay
Devon ball clay, sourced from England's Bovey Basin, offers superior casting slip performance and vitrification for bone china and electrical porcelain. It is a natural, uncalcined ball clay, falling under 'other clays'.
2508.40.00Earthenware Clay Mix
Blended natural clays for low-fire earthenware pottery, not agglomerated or calcined. The blend remains under 'other clays' as it is a natural clay mixture not processed beyond mechanical means.
2508.40.00English China Clay Ball Clay Blend
This blend combines English ball clay with china clay for improved workability in translucent porcelain. It remains under 'other clays' if ball clay characteristics predominate and the blend is not calcined or agglomerated.
2508.40.00Fire Clay Powder
Refractory-grade fire clay ground into powder for brick manufacturing and high-temperature applications. It is not calcined into mullite or chamotte, so it remains under 'other clays' as a natural clay.
2508.40.00Kaolin Clay Powder
Finely ground kaolin clay, also known as china clay, used in ceramics, paper production, and as a filler in paints. It is a natural clay not specified elsewhere in the chapter, falling under 'other clays'.
2508.40.00Kentucky Ball Clay
Kentucky ball clay is a fine-grained, highly plastic sedimentary clay prized for its whiteness after firing and low shrinkage. It is a natural, uncalcined clay, falling under 'other clays'.
2508.40.00OM4 Ball Clay
OM4 ball clay is a coarse, high-plasticity grade ideal for outdoor sculpture and architectural ceramics, offering robust green strength. It is a natural, uncalcined ball clay, falling under 'other clays'.
2508.40.00Sepiolite Clay Absorbent
Natural sepiolite clay in absorbent form for cat litter and industrial spills, not expanded. It is a fibrous clay distinct from meerschaum, falling under 'other clays'.
2508.40.00Tennessee No. 9 Ball Clay
Tennessee No. 9 ball clay is a premium-grade ball clay known for exceptional plasticity, casting properties, and fired color suitable for tableware and sanitaryware. It is a natural, uncalcined clay, falling under 'other clays'.