Color or shade fading is one of the major issues observed in decorative paints. Here we have carried out a systematic artificial weathering study using QUV and ATLAS weathering test chambers for Pigment Yellow 74 (PY 74). Pigment dispersion of PY 74 received from three different manufacturers are prepared. Various factors, such as the processing parameter, for example, grinding temperature (with and without cooling water circulation during the processing of pigment dispersion), with respect to paints the factors such as primers and clear base paints of different batches, and as for the ATLAS and QUV weatherability test concerned, test panels of different lots, and multiple QUV chambers are evaluated. The color difference was recorded at regular time intervals for the panels exposed to ATLAS and QUV test of 1000 hours using color spectrophotometer. A significant color difference was recorded for the panels coated with paints based on pigment dispersion prepared using PY 74 from different manufacturers, and the difference in grinding temperature. These results show the importance of process parameters such as grinding temperature on weathering properties, and systematic testing approaches for QUV/ATLAS for the pigments from different manufacturers.

中文翻译：

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影响装饰漆中颜料黄74耐候性因素的评价

颜色或色调褪色是装饰涂料中观察到的主要问题之一。在这里，我们使用 QUV 和 ATLAS 老化试验箱对颜料黄 74 (PY 74) 进行了系统的人工老化研究。制备从三个不同制造商收到的 PY 74 的颜料分散体。各种因素，例如加工参数，例如研磨温度（颜料分散加工过程中是否有冷却水循环），对于油漆，不同批次的底漆和清漆底漆等因素，以及对于涂料的影响。涉及ATLAS和QUV耐候性测试、不同批次的测试板和多个QUV室进行评估。使用彩色分光光度计以固定的时间间隔记录暴露于 ATLAS 和 QUV 测试 1000 小时的面板的色差。对于涂有基于使用来自不同制造商的 PY 74 制备的颜料分散体的油漆的面板以及研磨温度的差异，记录到显着的色差。这些结果表明了工艺参数（如研磨温度）对耐候性的重要性，以及对来自不同制造商的颜料的 QUV/ATLAS 系统测试方法的重要性。