Sourcing insulation pressboard from China
Uncoated electrical insulation pressboard classified in heading 4805 carries 0% UK duty across the relevant lines for goods from China. Virgin-pulp board requires timber due diligence when first placed on the Great Britain market. Specify electrical performance and moisture limits. Cambridge China Bridge sources uncoated electrical insulation pressboard.
Duty and classification for uncoated pressboard
Read from the UK Trade Tariff on 1 October 2026, heading 4805 covers other uncoated paper and paperboard in rolls or sheets, within the heading's processing limits. The selected lines distinguish grammage and recovered-paper content. They are classification candidates, not confirmation that every insulation board belongs here. The recovered-fibre line is included for comparison, not as a recommended electrical grade.
The supplied tariff snapshot shows 0% duty on goods from China, with no anti-dumping or countervailing duty, suspension or attached import control on the selected lines. For virgin-pulp paperboard first placed on the Great Britain market, confirm the applicable due-diligence requirements under the UK Timber Regulations with the Office for Product Safety and Standards. Obtain the pulp source, tree species and country of harvest before ordering.
Confirm the commodity code using the fibre composition, grammage, sheet or roll format and details of any coating, impregnation or further processing. For the wider heading, see fluting and testliner paper.
| Goods | Commodity code | Duty | Anti-dumping or countervailing duty on China |
|---|---|---|---|
| Other uncoated paper or board, 150 g/m² or less | 4805 91 00 90 | 0% | None |
| Other uncoated paper or board, over 150 but under 225 g/m² | 4805 92 00 00 | 0% | None |
| Recovered-fibre uncoated board, 225 g/m² or more | 4805 93 20 00 | 0% | None |
| Other uncoated board, 225 g/m² or more | 4805 93 80 00 | 0% | None |
Specify pressboard for its electrical application
State the intended transformer or other electrical application, pulp composition, thickness and tolerance, grammage, density, sheet dimensions and flatness. Describe whether the material is supplied dry and unimpregnated. Agree moisture, dielectric strength, electrical resistivity and cleanliness acceptance criteria with your engineer, including sample conditioning and test methods.
For oil-filled equipment, agree oil compatibility, absorption and dimensional behaviour after impregnation. Request batch-specific test results and retain an approved sample. Trial cutting, punching and assembly using the intended process before accepting the production grade.
Worked duty example
Illustrative example, not a quote: Illustrative batch of palletised pressboard sheets for a transformer workshop under 4805 93 80 00, invoiced at £27,000 free on board, with £3,500 of freight and insurance to the UK. The customs value is £30,500. Duty at 0% is £0. Import VAT at 20% is charged on the customs value plus duty, £30,500, so it is £6,100. 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
Dimensions: measure thickness across sheets, sheet size and flatness against the agreed tolerances.
Electrical properties: match batch test results to the ordered grade and independently test representative samples under the agreed conditioning.
Cleanliness: inspect for metallic particles, dark inclusions, surface contamination, cracks and separation between layers.
Moisture and packing: check moisture on arrival, wrapping integrity, wet patches, crushed corners and batch identification before releasing stock.
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What goes wrong
Buying by thickness alone can leave the electrical grade undefined. Fibre substitutions, contamination or uneven density can produce material that meets dimensions but fails the agreed electrical tests. Thick sheets can also split or crack during punching and forming.
Moisture pick-up during transport can change dimensions and electrical performance. Keep suspect batches separate, record packing damage and compare arrival tests with retained samples before use. Plan sampling and reporting through the quality inspection guide.
Cambridge China Bridge sources these products for UK businesses, checking the factory and the documents before shipment. See factory verification. For repeat volumes, see container programmes.
Frequently asked questions
What is the UK import duty on electrical insulation pressboard from China?
The supplied tariff snapshot shows 0% duty on the relevant heading 4805 lines for goods from China, with no anti-dumping or countervailing duty. Confirm that your board belongs in this heading.
Which commodity code applies to uncoated pressboard?
Confirm it from grammage, fibre source and processing. Other board weighing 225 g/m² or more may fit 4805 93 80 00; recovered-paper board has a separate line. Electrical use alone does not settle classification.
What should I test before using imported pressboard?
Agree thickness, density, moisture, dielectric strength, resistivity and cleanliness criteria. For oil-filled equipment, also trial oil compatibility, absorption and dimensional behaviour after impregnation.
Do timber rules apply to virgin-pulp pressboard?
Confirm with the Office for Product Safety and Standards whether the importer first placing your virgin-pulp paperboard on the Great Britain market must carry out timber due diligence. Obtain fibre-source information, including species and country of harvest.