Discussion
Lead release from a glazed article is regulated because
Answer: B
Correct answer: lead can dissolve into food and drink
An acidic food or drink will leach lead from a glaze whose composition or firing leaves it available, and the lead is then ingested. Release limits are therefore set for tableware and tested by extraction with acetic acid. Proper fritting, sufficient silica and alumina in the recipe, and correct firing all reduce the release; underfiring is the common cause of failing the test.
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