Overview
ISO 6486-1:2019 specifies a reproducible test method to determine the release of lead and cadmium from ceramic ware, glass‑ceramic ware and glass dinnerware intended to contact food. The method is based on an acetic‑acid leaching (extraction) procedure and defined analytical techniques to measure metal concentrations in the extraction solution. The standard excludes vitreous and porcelain‑enameled articles (covered by ISO 4531) and items used in food‑manufacturing or point‑of‑sale containers.
Keywords: ISO 6486-1, lead release testing, cadmium release, ceramic ware testing, food contact materials.
Key Topics and Technical Requirements
- Scope and definitions: clear terms for flatware, hollowware, dinnerware, drinking rim, reference surface area and test/sample preparation.
- Extraction reagent: a 4% (by volume) acetic acid solution is used as the test (extraction) solution for metal leaching.
- Sampling and sample preparation: priorities, sample sizes and preparation/preservation requirements for representative testing.
- Leach/extraction procedure: stepwise leaching (including drinking‑rim and filling tests for hollowware and flatware) to extract released metals for analysis.
- Repeat‑use articles: repeat‑use ware is tested in three successive extractions; the document notes reporting conventions and cautions around interpreting multiple extractions.
- Analytical methods: ICP‑MS is the reference method (highest sensitivity/accuracy); alternatives include FAAS and ICP‑OES (informative annexes provide method guidance).
- Calculations and reporting: procedures to calculate metal release per area or per item and required test report contents.
Practical Applications and Users
- Manufacturers of ceramic, glass‑ceramic and glass dinnerware for product development and quality control.
- Independent testing laboratories performing compliance and consumer‑safety testing.
- Regulatory agencies and customs authorities assessing imports against metal‑release limits.
- Product safety and QA teams managing supplier compliance and declarations for food contact materials.
- Importers, retailers and specifiers who require evidence of low lead/cadmium migration from wares.
Practical uses include pre‑production screening of glazes, routine batch testing, failure analysis, and documentation for international trade and market access.
Related Standards
- ISO 6486-2 - Permissible limits for the release of lead and cadmium (complements the test method).
- ISO 4531 - Test methods for vitreous and porcelain enamel articles (excluded from ISO 6486-1 scope).
- Supporting laboratory standards referenced within ISO 6486-1 (e.g., ISO 3696 for water quality).
ISO 6486-1:2019 is essential for anyone managing compliance of food contact ceramic and glassware with international safety requirements for lead and cadmium migration.
Open preview (PDF)Ceramic ware, glass ceramic ware and glass dinnerware in contact with food — Release of lead and cadmium — Part 1: Test method