OM4 Ball Clay
OM4 ball clay is a coarse, high-plasticity grade ideal for outdoor sculpture and architectural ceramics, offering robust green strength. HTS 2508.40.0110 covers this as other ball clays due to its sedimentary origin and ceramic applications.
Import Duty Rates by Country of Origin
Alternative Classifications
This product could be classified differently depending on its characteristics or intended use.
If contains gelatineous clays
Gelatineous clays like attapulgite classify separately in 2508.70.
If granular form for road aggregate
Pebble/granular clays prioritized to 2517 per chapter notes.
If pre-formed into refractory shapes
Shaped refractory products exclude raw clays from Chapter 25.
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Import Tips & Compliance
• Screen for sand content; high silica may trigger reclassification as aggregate
• Label shipments clearly as 'ceramic ball clay' vs. construction clay
Related Products under HTS 2508.40.01.10
Devon Ball Clay
Devon ball clay, sourced from England's Bovey Basin, offers superior casting slip performance and vitrification for bone china and electrical porcelain. Under HTS 2508.40.0110 as ball clays, it's distinguished by high kaolinite content with fine particle size.
Blue Ridge Ball Clay
Blue Ridge ball clay from Georgia deposits provides medium plasticity for tile bodies and engobes, with good suspension properties. Classified in HTS 2508.40.0110 for common blue clays and ball clays used in traditional ceramics manufacturing.
Carolina Ball Clay
Carolina ball clay from North Carolina is valued for electrical porcelain insulators due to its high fired strength and low electrical conductivity. Falls under HTS 2508.40.0110 as ball clay, uncalcined and suitable for high-voltage ceramics.
English China Clay Ball Clay Blend
This blend combines English ball clay with china clay for improved workability in translucent porcelain. Still classified under HTS 2508.40.0110 if ball clay characteristics predominate, as per 'other ball clays'.
Kentucky Ball Clay
Kentucky ball clay is a fine-grained, highly plastic sedimentary clay mined primarily in Kentucky, USA, prized for its whiteness after firing and low shrinkage. Classified under HTS 2508.40.0110 as 'common blue clay and other ball clays' due to its ball clay properties used in ceramics.
Tennessee No. 9 Ball Clay
Tennessee No. 9 ball clay is a premium-grade ball clay from Tennessee deposits, known for exceptional plasticity, casting properties, and fired color suitable for tableware and sanitaryware. It fits HTS 2508.40.0110 as other ball clays, unprocessed beyond mining and basic preparation.