Figure F21. Chromaticity measurement tests on a purple color standard (a* ≈ 12, b* ≈ –4) over a period of ~3–4 h, Expedition 345. See text for further explanations. A, B. Tests performed before the data drifting problem was fixed. Note the drift of a* and b* values. C, D. Tests performed after the data drifting problem was fixed.
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