Abstract In museums, polychrome artworks are highly sensitive to light. They are incredibly vulnerable to irreversible permanent photochemical damage, such as fading and discolouration caused by radiation from light sources. At the same time, such artworks need light sources with excellent colour rendering ability. Therefore, museum lighting sources have dual needs for protection and viewing. For light sources, correlated colour temperature (CCT) is a crucial index, and there are problems such as inconsistency of standards and lack of accuracy. In this work, ten kinds of narrow-band light sources were used to irradiate 17 kinds of pigment samples of polychrome artworks for 1440 h. The colour parameters were measured every 240 h to calculate the colour difference. Based on the data analysis, the law of colour damage of pigments under different narrow-band light sources was obtained, and the damage response function of pigments to different wavelengths of the spectrum was established. By screening the 610 spectra obtained by exhaustively fitting ten kinds of narrow-band spectra, 9477 spectra which meet the visual requirements were left. Combining the response function and spectral distribution, the relative damage values of the 9477 spectra to pigments were calculated, and the relationship between the relative damage value of pigments and the spectral CCT was obtained. It is proposed that 3100 ± 50 K is the CCT range with the lowest average damage to polychrome artworks. Moreover, a method for calculating the recommended CCT of precious polychrome artworks was given.

中文翻译：

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博物馆彩绘艺术品光源的相关色温指数

摘要 在博物馆中，彩色艺术品对光线非常敏感。它们非常容易受到不可逆的永久性光化学损伤，例如由光源辐射引起的褪色和变色。同时，此类艺术品需要具有出色显色能力的光源。因此，博物馆光源具有保护和观赏的双重需求。对于光源来说，相关色温（CCT）是一个至关重要的指标，存在标准不一致、精度不够等问题。在这项工作中，10 种窄带光源被用来照射 17 种彩色艺术品的颜料样品 1440 小时。每 240 小时测量一次颜色参数以计算色差。根据数据分析，得到了颜料在不同窄带光源下的颜色损伤规律，建立了颜料对不同光谱波长的损伤响应函数。通过对10种窄带光谱进行穷举拟合得到的610张光谱进行筛选，剩下9477张满足视觉要求的光谱。结合响应函数和光谱分布，计算出9477个光谱对颜料的相对损伤值，得到颜料相对损伤值与光谱CCT的关系。建议 3100 ± 50 K 是对彩色艺术品平均损坏最低的 CCT 范围。此外，还给出了计算珍贵彩绘艺术品推荐CCT的方法。并建立了颜料对光谱不同波长的损伤响应函数。通过对10种窄带光谱进行穷举拟合得到的610张光谱进行筛选，剩下9477张满足视觉要求的光谱。结合响应函数和光谱分布，计算出9477个光谱对颜料的相对损伤值，得到颜料相对损伤值与光谱CCT的关系。建议 3100 ± 50 K 是对彩色艺术品平均损坏最低的 CCT 范围。此外，还给出了计算珍贵彩绘艺术品推荐CCT的方法。并建立了颜料对光谱不同波长的损伤响应函数。通过对10种窄带光谱进行穷举拟合得到的610张光谱进行筛选，剩下9477张满足视觉要求的光谱。结合响应函数和光谱分布，计算出9477个光谱对颜料的相对损伤值，得到颜料相对损伤值与光谱CCT的关系。建议 3100 ± 50 K 是对彩色艺术品平均损坏最低的 CCT 范围。此外，还给出了计算珍贵彩绘艺术品推荐CCT的方法。剩下9477个满足视觉要求的光谱。结合响应函数和光谱分布，计算出9477个光谱对颜料的相对损伤值，得到颜料相对损伤值与光谱CCT的关系。建议 3100 ± 50 K 是对彩色艺术品平均损坏最低的 CCT 范围。此外，还给出了计算珍贵彩绘艺术品推荐CCT的方法。剩下9477个满足视觉要求的光谱。结合响应函数和光谱分布，计算出9477个光谱对颜料的相对损伤值，得到颜料相对损伤值与光谱CCT的关系。建议 3100 ± 50 K 是对彩色艺术品平均损坏最低的 CCT 范围。此外，还给出了计算珍贵彩绘艺术品推荐CCT的方法。建议 3100 ± 50 K 是对彩色艺术品平均损坏最低的 CCT 范围。此外，还给出了计算珍贵彩绘艺术品推荐CCT的方法。建议 3100 ± 50 K 是对彩色艺术品平均损坏最低的 CCT 范围。此外，还给出了计算珍贵彩绘艺术品推荐CCT的方法。