In a university teaching lab, the phrase “heavy-metal screened” does two jobs at once: it is a claim, and it is a record. The claim is easy to repeat on a product page, a purchase order or an induction slide. The record is the part that survives an audit. Students learn which one their demonstrator trusts, and they carry that habit into every laboratory they work in afterwards. A screening claim verified against a batch document and a screening claim repeated from memory look identical in a briefing and completely different in a notebook. A Claim Is Not a Record: What Screening Has to Attach To Heavy-metal screening has become…