Batch-0042-015: Chromatic Dispersion Compensation in Tibetan Thangka Pigment Layering Under Trans-Himalayan Solar Angle Variation

批次0042-015：跨喜马拉雅太阳高度角变化下唐卡颜料分层的色散补偿机制

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Tibetan thangka painters apply mineral pigments in stratified layers—lapis lazuli over lead white, malachite over gypsum—creating optical path differences that offset chromatic dispersion across 15°–75° solar elevation ranges.
At dawn, when sunlight traverses maximum atmosphere, the layered structure compresses blue dispersion; at noon, thinner atmospheric path triggers compensatory red-shift absorption in underlying substrates.

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