ASTM D5383-16 (2021) Standard Practice for Visually Determining the Lightfastness of Art Materials for Artists and Art Technicians provides a method for visually assessing the lightfastness of art materials for artists and art technologists. This standard assesses whether different art materials (such as pigments, inks, and coatings) will fading or discoloration after prolonged exposure by observing the color changes of artworks under natural or artificial lighting conditions. This method allows artists and related technicians to understand the durability and long-term light effects of materials and thus select art materials suitable for long-term preservation. The standard helps ensure that the color and mass of artworks are maintained, improving the science and Reliability of artistic creation and restoration.