RE: [Demo notebook] Collector’s comparison desk: dimensions, fit and documented differences · RWI-10122
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November 9, 2020 at 3:49 am
#80121
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Case 29 — 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-10122/29: address this question within its stated limits.