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RE: [Demo notebook] Reference notebook: corrections and recurring beginner questions · RWI-08432

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May 21, 2020 at 1:33 pm #65413
CaliberReader 02272
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Case 27 — Crystal reflections: why a dark patch is not a coating test

No single lighting setup settles that question. Compare multiple controlled angles and describe the visible observation without asserting material specifications that have not been verified.