Optical Flint Glass Masses
Dense flint glass in large, unworked masses with high refractive index, melted for precision optics. Classified in HTS 7001.00.20.00 as other glass in the mass, prior to any shaping or polishing.
Import Duty Rates by Country of Origin
Alternative Classifications
This product could be classified differently depending on its characteristics or intended use.
If production trimmings or rejects
Manufacturing scrap of any glass type is always 7001.00.10.
If cast into unwrought blocks
Casting process classifies as non-wired sheets in heading 7003.
If made into optical fibers
Drawn into fiber form moves to glass fibers heading 7016.
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Import Tips & Compliance
• Provide refractive index specs in entry docs to prove optical grade without 'worked' status
• Segregate from lead crystal batches (24%+ PbO) to avoid 7013 confusion
• Audit risk high if undervalued; use transaction value with melt cost proofs
Related Products under HTS 7001.00.20.00
Soda-Lime Glass Mass Billets
Unworked soda-lime glass in the form of solid billets or lumps, produced by melting raw materials and cooling into massive shapes without further processing. Classified under HTS 7001.00.20.00 as 'glass in the mass, other' since it is unworked glass not drawn, blown, or otherwise formed into specific shapes.
Float Glass Melt Masses
Molten-cooled masses of float glass composition for sheet production, in unworked lump form. Under HTS 7001.00.20.00 as other glass in the mass before floating or rolling.
Colored Soda Glass Masses
Soda glass in mass with integrated colorants like cobalt for blue tint, unworked. Classified HTS 7001.00.20.00 as other glass in the mass, color from melt not surface.
High-Silica Glass Billets
Glass billets with >60% SiO2 for thermal applications, in unworked mass form. HTS 7001.00.20.00 for other glass in the mass, akin to glass wool base but solid.
Architectural Glass Melt Lumps
Lumps of melt from architectural flat glass production, unworked for remelt. HTS 7001.00.20.00 as glass in the mass, other, pre-sheet forming.
Fused Quartz Glass Lumps
High-purity fused quartz glass in irregular lump form, created by fusing silica at high temperatures into a massive, unworked state. Falls under HTS 7001.00.20.00 per Chapter 70 note including fused quartz as 'glass in the mass, other', ideal for remelting in optics production.