RE: [Demo notebook] Collector’s comparison desk: dimensions, fit and documented differences · RWI-28278

Case 89 — Crystal reflections: why a dark patch is not a coating test · comparison exercise

Correction note for “Crystal reflections: why a dark patch is not a coating test”: retain the wording beginning “No single lighting setup settles…” in the record. If later material changes it, add the date, the changed wording and the source for that change; do not invent a completed correction here. Make the basis of a comparison explicit before interpreting it.