Dual-Stimuli Chromogenic Membranes for Optical Security: Photochromic and Halochromic Anti-Counterfeiting Applications.

Small · 2025 · PMC12444903 · PMID 40757902

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a decreasing trendno p-value reported

A decreasing trend in pixel contrast is observed, reflecting the progressive loss of photochromic activity, likely attributed to heat‐induced fatigue and thermal fading of the spiropyran moieties.

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