Prepared by: AsiaQuartz Editorial Team
Technical review by: AsiaQuartz Product, QC & Supply Chain Team
Last updated: July 2026
First, Quick answer: Do not ask only, “Is this quartz GB 46028 compliant?” Ask the supplier to connect the applicable requirement to the exact product. Application, test report, production site and shipment batch.
First, this checklist contains 17 verification items. A strong response gives document names, report numbers. Dates and file attachments. “Compliant,” “passed,” or a one-page factory declaration without product-specific evidence is not a complete answer.
How to use the response column
- Provided: identify the attached file, report number and date.
- Not applicable: state the product classification, application and reason.
- In progress: name the responsible party and expected completion date.
- Missing: leave the item open for commercial or technical follow-up.
Category A: Product Identity and Classification
First, compliance evidence cannot be reviewed until the legal manufacturer, production site and product category are clear. Marketing names such as “quartz,” “artificial marble” or “zero-silica surface” are not enough by themselves.
| # | What to Request | What a Good Response Looks Like | Supplier Response / Evidence |
|---|---|---|---|
| A1 | Legal manufacturer, production facility and product classification under the final GB 46028-2025 text. | A written statement naming the legal manufacturer and factory address and identifying the product as natural stone, resin-bonded synthetic stone, inorganic synthetic stone or another applicable category. The classification should use the standard’s terminology rather than a sales description. | |
| A2 | Exact order coverage: product family or SKU, colour, nominal thickness, finish and manufacturing site covered by the evidence. | A schedule that matches the quotation or purchase order. It should show which SKUs are covered by each report and identify any colours, thicknesses, finishes or production sites that are not covered. |
Category B: Intended Application and Thickness Boundary
First, a supported countertop, a bonded wall panel and a mechanically dry-hung panel are different applications. The supplier should map the product to the actual end use before applying thickness or performance requirements.
| # | What to Request | What a Good Response Looks Like | Supplier Response / Evidence |
|---|---|---|---|
| B1 | Written intended-use and installation statement for this order. | A precise description such as “cabinet-supported kitchen countertop,” “adhesive-bonded interior wall panel,” or “mechanically dry-hung exterior panel.” Avoid broad statements such as “suitable for walls, floors and countertops.” | |
| B2 | Does the final GB 46028 dry-hung thickness requirement apply to this product and installation? If yes, identify the material category and applicable requirement. | A clause-based answer using the final standard. For a countertop order, the supplier may state that the dry-hung requirement is not the governing application requirement. For a dry-hung order, the supplier should identify the material category and minimum effective thickness without relying on a trade-media headline. | |
| B3 | Thickness measurement record where thickness is a relevant safety requirement. | A record distinguishing nominal, measured and effective thickness where applicable, with the measurement method, sample quantity, tolerance and result. The document should explain how surface treatment, backing or other layers are treated in the calculation. |
First, Do not use a universal 20 mm rule: The standard’s dry-hung requirements are material- and application-specific. A nominally thin countertop is not automatically non-compliant because a dry-hung wall-panel rule exists. Equally, a nominal 20 mm slab should not automatically be approved for every dry-hung system.
Category C: Applicable Clauses and Test Evidence
First, gB 46028-2025 is a safety-requirements standard, not one universal laboratory test method. The supplier should identify which clauses apply and which referenced method supports each result.
| # | What to Request | What a Good Response Looks Like | Supplier Response / Evidence |
|---|---|---|---|
| C1 | Clause-and-test matrix based on the final GB 46028-2025 text. | A table showing: applicable requirement → referenced test method and edition → report number → tested product → result → conclusion. Draft references or unnamed “national standard tests” should be replaced with final references. | |
| C2 | Product-specific flexural-performance report and conditioning evidence where required by the product category and application. | The complete report identifies the method and edition, specimen dimensions, thickness, finish, conditioning state, number of specimens, individual or summary results, test date, legal manufacturer and production site. Exterior or conditioned-use claims should include the applicable preconditioning evidence. | |
| C3 | Laboratory identity, accreditation details where relevant, report verification route and full report pages. | A report that can be traced to the issuing laboratory, includes all pages and annexes, and shows the sample identification and test basis. Screenshots, cropped result tables or factory-made summaries are not substitutes for the original report. | |
| C4 | Written explanation for every item marked “not applicable.” | The explanation identifies the product category, intended application and clause basis. “Not requested by the customer” or “all products are compliant” is not an applicability analysis. |
Category D: Special Requirements and Destination-Market Documents
First, some evidence applies only to particular materials or supplied systems. Keep those items separate from the core quartz-slab file so that a report for one material is not presented as universal evidence.
| # | What to Request | What a Good Response Looks Like | Supplier Response / Evidence |
|---|---|---|---|
| D1 | Radionuclide requirement applicability statement. | The supplier should confirm whether the relevant GB 46028 radionuclide provision applies to the declared material. The natural-granite classification table should not be copied automatically into an engineered-quartz file. Where the requirement applies, provide the complete GB 6566 report; where it does not, record the basis for “not applicable.” | |
| D2 | Documentation for separately supplied stone adhesives, dry-hanging epoxy, protective agents or care products. | Product name, manufacturer, intended use, applicable product standard, hazardous-substance evidence, safety data sheet and batch identification. Do not confuse the polymer binder inside a quartz slab with a separately supplied installation adhesive. | |
| D3 | Separate destination-market compliance matrix. | A list of additional ASTM, EN, ISO, crystalline-silica, fire, food-contact, building-code, workplace-safety or project-specific documents required by the buyer. GB evidence should be identified as Chinese-standard data, not relabelled as destination-market compliance. |
Category E: Batch Traceability
A technically valid report is still weak evidence if the supplier cannot connect the tested specimen to the slabs or components loaded for shipment.
| # | What to Request | What a Good Response Looks Like | Supplier Response / Evidence |
|---|---|---|---|
| E1 | Traceability chain from test specimen to approved product and current production lot. | A cross-reference showing report number → tested sample or retained reference → approved SKU or product family → production line and lot → order number. Any gap should be explained. | |
| E2 | Actual slab or component label format. | A label image and field explanation showing at least the product code, batch or lot, thickness, production date or traceable production reference and QC status. Labels should remain readable after packing. | |
| E3 | Alignment of QC records, slab labels, packing list and shipment documents. | The same product and batch identifiers appear across the inspection record, full-slab photos, packing list, crate or A-frame list and shipping file. Where naming systems differ, the supplier provides a written reconciliation table. |
Category F: Change Control and Revalidation
First, test evidence describes a defined product at a defined time. Changes to formulation, raw materials, thickness, production site or process may affect whether the evidence still applies.
| # | What to Request | What a Good Response Looks Like | Supplier Response / Evidence |
|---|---|---|---|
| F1 | Written buyer-notification commitment for material or process changes. | The policy identifies notification triggers such as formulation, aggregate or filler source, binder system, production site, production line, thickness, backing, finish or testing laboratory. It also states the notification timing and approval process. | |
| F2 | Document review, retest and revalidation plan. | A policy explaining when reports are reviewed, what changes trigger new testing, how standard revisions are monitored and who approves continued use of existing evidence. Do not assume every report has a universal annual expiry or that one report remains valid indefinitely. |
Use this checklist alongside our product-level silica-free surface review checklist so every document set matches the same product reference.
Five Documentation Red Flags
| Red Flag | Why It Matters | Required Follow-Up |
|---|---|---|
| One generic “GB compliant” declaration | It does not identify the product, application, clause, method or report. | Request the clause-and-test matrix and underlying reports. |
| A report for a different colour, thickness or factory | The tested specimen may not represent the order. | Obtain a written product-family justification or order-specific testing. |
| Draft-standard references after the final standard took effect | Final clauses or referenced methods may differ. | Require evidence mapped to the final GB 46028-2025 text. |
| Natural-granite radionuclide limits copied into every quartz file | The product classification and requirement may be wrong. | Ask for an applicability statement before requesting or accepting the report. |
| No connection between reports and packed slabs | The documents may describe a product other than the shipment. | Build a report-to-lot-to-label-to-packing-list traceability chain. |
How to Send This Checklist to a Supplier
Attach the checklist to the inquiry or purchase-order review and ask the supplier to return it with:
- the completed response column;
- a numbered attachment list;
- full test reports rather than screenshots;
- a list of items marked not applicable and the reason;
- a dated action plan for missing documents; and
- the name and position of the person responsible for the response.
First, What a strong response looks like: Every applicable item identifies a document or report, every “not applicable” item has a reason. And every open item has an owner and date. Specifically, the evidence chain reaches the actual production lot and shipment—not only the factory’s general product catalogue.
FAQ：
First, not necessarily. The acceptable coverage depends on product classification, formulation families, thickness, finish, intended application, laboratory sampling and the applicable clause. Specifically, the supplier should explain why one report covers multiple SKUs rather than assuming that one tested colour validates the entire catalogue.
First, no. First identify what GB 46028, the destination market and the project specification actually require. Additional tests may be useful for product characterization. But they should not be presented as mandatory GB 46028 evidence unless the final standard makes them applicable.
First, no fixed rule can be applied to every report. Review whether the product, formulation, raw-material source, production site. Specifically, production line and test method have changed. A technically relevant older report with documented change control may be more useful than a recent report for the wrong product.
First, no. Chinese-standard evidence may support supplier screening and product characterization. But it does not replace a destination-market method, declaration or approval when that method is required by law. A harmonized technical specification, a building authority or the customer contract.
First, no. Radionuclide testing and crystalline-silica analysis measure different things. Silica-free or low-crystalline-silica claims require separate product-specific evidence using an appropriate mineralogical method and the requirements of the destination market.
Related Reading
- GB 46028-2025: A Practical Compliance Guide for Quartz Importers — Scope, application boundaries and procurement implications
- GB 46028 vs ASTM and EN: How Quartz Test Data Should Be Used — Cross-standard test-data limits and practical use
- Quartz Slab QC & Packing Guide for Importers — Container-level inspection and packing evidence
- Quartz Slab Sizes, Dimensions & Thickness Options — Slab-format and thickness specifications
- Silica-Free Quartz Procurement Guide — Product-specific composition and supplier documentation
How this checklist was prepared:
- Standard status and scope: GB 46028-2025 was checked against China’s official national-standard platforms. It was published on August 1, 2025 and took effect on August 1, 2026.
- Checklist design: The 17 items translate the parent guide’s procurement framework into document requests covering product identity, application, applicable tests, auxiliary materials, traceability and change control.
- Important boundary: This version does not treat every GB/T 35160 method or the natural-granite radionuclide table as a universal engineered-quartz requirement. Applicability must be established from the final standard and the actual product and use.
- Limitations: This is not a certificate, legal opinion or laboratory assessment. Confirm clause numbers, referenced method editions and destination-market obligations with the official texts and qualified technical advisers.
- Last standard-status check: August 3, 2026.
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