Lead and Cadmium Emissions from Glassware ISO 7068-1

Lead and Cadmium Release Test for Glass Articles in Contact with Food (ISO 7086-1)

Glass articles intended to come into contact with food are among the materials that can directly affect human health during daily use. For this reason, the safety of glass products—particularly in terms of heavy metal release—is strictly regulated by national and international legislation. The lead and cadmium release test for glass articles in contact with food according to ISO 7086-1 is one of the most widely accepted standard test methods in this field.

Purpose of ISO 7086-1

The ISO 7086-1 standard aims to determine the amounts of lead (Pb) and cadmium (Cd) that may migrate from glass surfaces into acidic food simulants. The test is specifically designed to assess potential risks associated with colored, decorated, or coated glass surfaces.

Products Covered by the Test

This test method is applicable to the following product groups:

• Glassware (drinking glasses)

• Plates and bowls

• Glass bottles

• Decorated or printed glass products

• Glass kitchenware used for food service

For these products, the lead and cadmium release test according to ISO 7086-1 is of critical importance for consumer health.

Test Method and Technical Details

The ISO 7086-1 test generally follows the steps below:

• Sample Preparation: The glass article is cleaned in accordance with the standard to remove any surface contamination.

• Use of Simulant: A 4% (v/v) acetic acid solution is used as the food simulant.

• Extraction Conditions: The sample is filled with the specified volume of simulant and maintained for 24 ± 0.5 hours at 22 ± 2 °C.

• Analytical Determination: The amounts of Pb and Cd in the extract are typically determined by ICP-MS or AAS techniques.

• Expression of Results: Results are reported in mg/L or mg/dm².

Data obtained through this method are evaluated for compliance with the requirements of the ISO 7086-1 lead and cadmium release test for glass articles in contact with food.

Limit Values and Regulatory Compliance

The limit values for lead and cadmium specified in ISO 7086-1 may vary depending on the intended use of the product, contact duration, and surface area. Test results are interpreted in line with the Turkish Food Codex, EU Regulation 1935/2004, and relevant technical regulations. In this respect, the ISO 7086-1 lead and cadmium release test is frequently required for both export and domestic market compliance.