Color change is one of the parameters most often measured in weathering tests of materials and products. This is usually manifested as (1) a color fade, (2) the development of color, such as yellowing, and (3) hue shift, which can be caused by either a change to one or more colorants, or the development of color through polymer degradation.
Understanding the principle, application, and limitation of color measurement is critical to create precise evaluation data for ageing of textiles, coatings, printed matter, or other colored products.
