Chromogenic Rituals in Ethiopian Orthodox Liturgical Textiles
埃塞俄比亚正教礼仪织物中的显色仪式:天然染料光化学与神学时间性的交织
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Ethiopian *täbäts* vestments use *Cordia africana* bark extract whose anthraquinone derivatives undergo photo-oxidation cycles aligned with liturgical calendar phases.
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At Lalibela’s Bet Giyorgis, spectral reflectance measurements show deliberate fading gradients across altar cloths corresponding to Lenten fasting durations.
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