Overview
Piercing post assemblies are the product category evaluated in LGC 2003, a final report on nickel sensitisation risk from stainless steel posts inserted into pierced ears and other pierced body parts during wound epithelization.
Classification (standalone adult nickel-contact node)
This is a non-food, adult nickel-contact node — body-piercing posts and studs evaluated under the EN 1811 nickel-release standard, not a food product. It is the adult sibling of the children’s metal jewelry row (Cat 21 Row 22), cross-linked but not merged: the children’s mouthing/handling lead (Pb)/cadmium (Cd) platform differs from this adult prolonged-skin-contact Ni-sensitization platform. Per docs/governance/taxonomy-completeness-2026-06.
Source-Grounded Values
| Value | Scope | Source treatment |
|---|---|---|
| 0.05% m/m nickel (Ni) | Nickel Directive content limit for homogeneous post assemblies during epithelization, as described in the report. | Existing regulatory comparator. |
| 0.5 µg/cm2/week | Nickel Directive release-rate limit for direct and prolonged skin-contact products, as described in the report. | Regulatory comparator for skin-contact products. |
| 0.2 µg/cm2/week | Migration limit recommended by LGC 2003 for all post assemblies tested under EN 1811. | Report recommendation, not food evidence. |
| <0.01 µg/cm2/week | Detection-limit context for finished stainless steel wires and commercial stainless steel piercing post assemblies in the report. | Context-only experimental finding. |
Product Evidence
LGC 2003 preserves the following product/material groups:
| Source product/material group | Exact source table location |
|---|---|
| 316L Stainless Steel Plates | Table 1. 316L Stainless Steel Plates; Table 4. Nickel Release from Stainless Steel Plates in Different Simulants |
| Stainless Steel Wires | Table 2. Stainless Steel Wires; Table 5 Nickel Release from Stainless Steel Wire in Different Simulants Using EN 1811; Table 7 and Table 8 commercial laboratory confirmations |
| Stainless Steel Piercing Post Assemblies | Table 3. Stainless Steel Piercing Post Assemblies; Table 6 C3012231 Nickel Release from Finished Articles in Different Simulants Using EN 1811 |
| Gold-plated stainless ear studs and butterflies | Table 6 (Cont’d) C3012232 Nickel Release from Finished Articles in Different Simulants Using EN 1811 |
Related Pages
References
Works cited in this page’s text, in first-appearance order. See Sources for this page’s source inventory. Each title links to a source record with bibliographic details, reported findings, and document provenance.
- Risk of sensitisation of humans to nickel by piercing post assembliesGovernment
- Total Diet Study Report: Fiscal Years 2018-2020 Elements DataGovernment
Sources
Source records associated with this topic. Inclusion does not establish that every finding applies to this product or ingredient. References above identify works cited in the text.
| # | Citation | Year | Type | Used on this page for |
|---|---|---|---|---|
| 1 | CIRS – C&K Testing (Hangzhou C&K Testing Technic Co. 2023. REACH ANNEX XVII — Restrictions on the Manufacture, Placing on the Market and Use of Certain Dangerous Substances, Mixtures and Articles, CIRS – C&K Testing (Hangzhou C&K Testing Technic Co., Ltd), Hangzhou, China; downloadable consolidated reproduction of Annex XVII to EU REACH Regulation (EC) No 1907/2006; document header states ‘Last update: 2023-07-17’. 64 pages, two-column ‘Column 1 (substance or group) / Column 2 (conditions of restriction)’ tabular layout reproducing entries 1 through 77. | 2023 | Industry | Contribution to this topic remains under review; see the source record for its reported scope. |
| 2 | Hohenstein 2023. EU Releases New Standard For Nickel EN 1811:2023, Hohenstein Technical Bulletin (Bönnigheim, Germany; June 2023) | 2023 | Industry | Contribution to this topic remains under review; see the source record for its reported scope. |
| 3 | Gautam et al. 2022. Health Risk Assessment: Heavy Metals (Lead, Cadmium and Nickel) in Jewellery (Oral and Dermal Contact), Institute of Environmental Science and Research client report FW22035 for the New Zealand Ministry of Health, November 2022 | 2022 | Agency report | Contribution to this topic remains under review; see the source record for its reported scope. |
| 4 | Limited 2003. Risk of sensitisation of humans to nickel by piercing post assemblies, Final Report submitted under EC Contract ETD/FIF.2001592 | 2003 | Government report | EC-commissioned LGC dossier characterising Ni release from stainless steel piercing post assemblies in artificial sweat; foundational evidence for EU Nickel Directive compliance and dermal Ni sensitisation risk for this non-food product row |
Who this page is for
Pending. The brand-legal, retailer-compliance, HMTc-internal, and regulator audiences are listed; this section will frame what each is looking for on this page.
Methodology
Pending. This section will state the speciation, basis-preservation, row-fit, and pooling rules that govern downstream sections of this page.
Literature Evidence Summary
Pending: regenerated by tools/evidence/apply-product-hmtc-evidence-summaries.mjs once sources route and the pooling engine emits aggregate rows for this product category.
Source Evidence Inventory
Hand-curated section. Populated by the synthesis pass as sources contribute.
Broad Product Context: Author-Scope Index
Pending: regenerated by tools/evidence/apply-product-broad-context.mjs once broad-scope sources route to this page.
Federal/Regulatory Limits vs Field Findings
Pending: regenerated by tools/apply-product-crosswalk-sections.mjs once applicable_regulations are identified and field-finding evidence is pooled.
Levers to reduce contamination
Cat 4 (produce, nuts, seeds) regulatory enforcement intersects two domains: heavy-metal contamination (the focus of this row) and microbial contamination (FDA recall notices for E. coli/Salmonella/Listeria in fresh produce, a separate concern). FDA Total Diet Study and Pesticide Data Program surveillance reports establish the heavy-metal occurrence baseline (FDA 2022). State-level Cd-in-leafy-greens enforcement has been active in California under Prop 65; the related Mateel Environmental settlement framework has shaped compliance practice. Individual brand recall actions are not enumerated here.
How standards math uses this page
This page reports what the peer-reviewed and government literature says about heavy-metal concentrations in this product category; it publishes no certification thresholds of its own. Certification criteria are set separately under the Heavy Metal Tested & Certified program at heavymetalcertified.com, which reads this page as its literature baseline. The two are kept apart by design, so this page remains an independent record of the evidence rather than a justification for any threshold.
Historical recalls and enforcement
Cat 4 (produce, nuts, seeds) regulatory enforcement intersects two domains: heavy-metal contamination (the focus of this row) and microbial contamination (FDA recall notices for E. coli/Salmonella/Listeria in fresh produce, a separate concern). FDA Total Diet Study and Pesticide Data Program surveillance reports establish the heavy-metal occurrence baseline (FDA 2022). State-level Cd-in-leafy-greens enforcement has been active in California under Prop 65; the related Mateel Environmental settlement framework has shaped compliance practice. Individual brand recall actions are not enumerated here.
Update history
No substantive edit history is available in this build. The full commit record is available in git.