Replication Data for: The lightfastness of early synthetic organic dyes

This dataset provides lightfastness data for textiles dyed with early synthetic dyes, using historic sources from 1874 to 1905. Diffuse reflectance measurements were taken as a function of light dose (Mlxh) during exposure to a warm white (3200 K, 95+ CRI) LED illuminant at 20 klx. Calculated colour values are given using D65/2° viewing conditions, for samples measured over black and white backgrounds. Colour change was examined as a function of light exposure using the CIEΔE2000 formula. Lightfastness was assessed as the dose causing a just-noticeable difference (JND). A JND was defined as a colour change equivalent to ISO 105-A02 Grey Scale 4, using ΔE00=1.7 as an equivalency. A table of of metadata for the test samples is also provided. Note that the chemical classification and associated Colour Index (CI) information is based on assumptions made during cross-referencing of trade names and manufacturers with the first edition of the CI. Some corrections/amendments may be made following chemical analysis of the respective materials.

本数据集基于1874年至1905年的历史文献，收录了早期合成染料染色纺织品的耐光性数据。实验采用色温3200K、显色指数（CRI）≥95的暖白色LED光源，在20 klx光照强度下，采集了随光照剂量（Mlxh）变化的漫反射光谱数据。所有计算得到的色值均采用D65标准光源/2°视场角的观测条件，且分别针对黑、白两种背景下的测试样品进行测定。本研究采用CIEΔE2000色差公式，探究了色差值随光照剂量的变化规律。耐光性以恰好可察觉色差（Just-Noticeable Difference, JND）对应的光照剂量作为评价指标。本研究将ΔE00=1.7作为等效标准，规定恰好可察觉色差等价于ISO 105-A02灰色样卡4级对应的色差变化。本数据集同时提供了测试样品的元数据表。请注意：本数据集的化学分类及相关色彩索引（Colour Index, CI）信息，是通过将商品名与生产商信息与第一版《色彩索引》进行交叉比对得到的推测结果；后续可通过对相关材料的化学分析对该信息进行修正或调整。