Sourcing fused quartz polishing plates from China

Duty and classification for polishing plates

Read from the UK Trade Tariff on 1 October 2026, heading 7020 covers other articles of glass. Its residual fused-quartz line, 7020 00 10 90, is the candidate for the polishing plates covered here, subject to confirmation that another heading does not describe the finished article more specifically. The plate forms in the table share this code; they are not separate tariff lines.

The supplied record shows 0% duty for goods from China, with no anti-dumping or countervailing measure and no suspension listed for this line. It attaches import and export controls on cat and dog fur. Imports and exports of that fur and products made from it are banned. Specify the plate material and any supplied accessories clearly, and ask the customs broker to confirm the declaration requirement for a quartz-only consignment.

Provide the broker with the material certificate, drawing, surface treatment and intended use. Confirm classification through the commodity code guide. For related fused-quartz articles within the wider heading, see fused quartz wafer carriers.

Flatness, finish and machine fit

Specify whether the plate supports the workpiece or provides the working polishing surface. Agree diameter or length and width, thickness, flatness, face parallelism, surface roughness, edge chamfers and mounting features. State whether grooves are required, including their layout and finish. Define the measurement method and support arrangement so the factory and buyer assess flatness consistently.

Request a batch-linked material certificate covering the agreed purity, impurities, hydroxyl content and bubble or inclusion limits. Describe the slurry, cleaning chemicals, mounting arrangement and operating conditions, then trial a sample in the intended process. Suppliers must provide safe, compliant products with the correct documentation; workplace supply duties include safe-use information and testing or examination necessary for compliance.

Worked duty example

Illustrative example, not a quote: Illustrative order: 100 fused quartz polishing plates under 7020 00 10 90, invoiced at £15,000 free on board, with £1,200 of freight and insurance to the UK. The customs value is £16,200. Duty at 0% is £0. Import VAT at 20% is charged on the customs value plus duty, £16,200, so it is £3,240. With no duty, the only import tax is the VAT, which a VAT-registered importer can usually reclaim. The import duty and VAT guide explains each step.

Inspection checklist

Material: match certificates and batch identification to the plates, and inspect bubbles, inclusions and visible cracks against the agreed acceptance criteria.

Geometry: measure thickness, flatness, parallelism and mounting features using the agreed method; check that the plate seats correctly without forcing it.

Working surface: inspect scratches, pits, chips and groove edges under agreed lighting, and compare roughness results with the approved sample.

Packing: check individual protection, face separation and support around vulnerable edges; photograph damage before unpacking further. Use the inspection guide to agree the inspection brief.

What goes wrong

A glossy face can conceal poor flatness or waviness. Clamping a plate to make it sit flat can introduce stress, while chipped edges or loose particles can contaminate the polishing process. A material certificate alone does not establish surface quality or machine fit.

Check the finished plate after its final machining and cleaning, rather than accepting measurements from the blank. Keep the approved sample and inspection method with the purchase specification. Trial the plate with the intended workpiece and slurry before accepting a production batch.

Cambridge China Bridge sources these products for UK businesses, checking the factory and the documents before shipment. See factory verification. For own-brand ranges, see sourcing for brands.