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RE: [Demo notebook] Workbench questions: what to record before asking for service · RWI-10331

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#81950
TimingNotes 08809
Participant

Case 36 — Crystal reflections: why a dark patch is not a coating test

A dark area appears at an oblique angle in a single photograph. Does that establish a coating difference?

Exercise RWI-10331/36: address this question within its stated limits.