## Background The EU RoHS Directive (Directive 2011/65/EU and amending Directive (EU) 2015/863) sets limits for lead, cadmium, mercury, hexavalent chromium, polybrominated biphenyls, polybrominated diphenyl ethers, and four phthalates, with cadmium at 0.01% and the rest at 0.1%, calculated by homogeneous material. The exemption list attached to the directive is not permanently valid; some entries are under review or in expiry windows. Once an exemption no longer applies, solder, alloys, and glass-ceramic components that originally relied on the exemption need to re-provide evidence of conformity. For exporting enterprises, this is not a piece of news, but a round of document rework that is being transmitted to the supplier level.
## Frontline Observations In recent months, during self-checks of RoHS declarations of conformity (DoC) and technical files, complete-machine manufacturers have been required to supplement noticeably more detailed evidence. In the past, a supplier declaration that "the complete machine does not contain hazardous substances" often passed; now the more common requirement is: list test data by homogeneous material and explain the exemption entry cited. We have seen three types of high-frequency gaps on the frontline.
The first is unclear disassembly of homogeneous materials. For example, the coating and substrate of the same screw, and the insulation layer and conductor of the same wire segment, must each correspond to test data separately. If a complete-machine report only tests "housing plastic," it cannot cover different internal materials.
The second is misalignment between exemption citations and measured data. A supplier declaration cites an exemption, but the test report does not indicate the element content corresponding to that exemption, so the reviewer cannot determine whether the exemption still holds.
The third is changes not synchronized. After changing materials, suppliers, or electroplating processes, old reports are not updated, and the bill of materials in the technical file does not match the tested samples.
In terms of cycle time, the industry reference range for a single homogeneous material test is 3–7 working days, with a reference cost range of RMB 1,500–5,000; if multi-material disassembly and multi-supplier aggregation are involved, the complete-machine project cycle often falls within 2–4 weeks.
| Common Gap | Frontline Manifestation | Recommended Action | | --- | --- | --- | | Unclear disassembly of homogeneous materials | Report covers only some materials | Disassemble item by item according to the BOM, marking material and color | | Exemption citation without data support | Declaration cites exemption but report has no corresponding element | Supplement testing for the corresponding element or change materials | | Changes not synchronized | Bill of materials does not match tested samples | Establish a change-triggered retest mechanism | | Insufficient level of supplier declarations | Only complete-machine declaration provided | Require upstream to provide homogeneous-material-level data |
## What Enterprises Should Do First, change RoHS documentation from "a single certificate" to "a traceable data package." At minimum, it should include: bill of materials, homogeneous material disassembly table, corresponding test reports, exemption citation explanation, and supplier change records.
Second, prioritize retesting high-risk materials. Solder, PVC wire, electroplated parts, rubber seals, pigments, and coatings are high-frequency risk items, and it is recommended to prioritize verification during the exemption review window.
Third, manage exemption dependence as a checklist. Record item by item which exemption the product cites, which material it corresponds to, and what the alternative solution is after the exemption expires. For those without an alternative solution, material replacement verification should be started as early as possible.
Fourth, change management must leave a trail. When changing materials and suppliers, trigger RoHS re-evaluation simultaneously to avoid disconnection between technical documents and physical objects.
In such projects, Shuwang Testing and Certification Platform usually undertakes document pre-review and testing coordination: cooperative laboratories complete homogeneous material testing and issue reports, and the platform assists in disassembling the BOM, checking exemption citations, and tracking retest progress. To learn about the specific process, please visit https://www.shuwang-cert.com.
## Notes The RoHS testing cycle and fees are public industry reference ranges, and the actual ones are subject to engineer evaluation, sample quantity, and institution scheduling. The applicable status of exemption clauses is subject to the official original EU text and the latest amendments; this article does not replace the original regulatory text. Service boundary statement: Shuwang Testing and Certification Platform is an export certification solution service provider and does not engage in testing activities, nor is it a certification body. The testing described on this page is completed by cooperative laboratories with CNAS/CMA or equivalent qualifications, and certificates are issued by EU notified bodies (NB) or institutions authorized by the standards bureau of the destination country. The cycle and fees on this page are public industry reference ranges, and the actual ones are subject to engineer evaluation and institution scheduling.
**One-sentence conclusion**: The real pressure of the RoHS exemption review is not on the complete-machine certificate, but on the traceability of homogeneous-material-level data; whoever first gets the supply
Whoever gets the chain data package done solidly will save a round of rejection.