摘要:Light fastness, in its broadest sense, is the resistance of colours to fading underthe influence of a light source. Light fastness is one of the most importantphysical, and therefore visual, properties sought in both pigments and in theinks. Artificial and natural light causes most pigments to fade resulting in colourchange. The light fastness of inks is important especially in the packagingand advertising industries. The posters and advertisements hung on thebillboards used especially in outdoor advertising, printed product packagingand other printed products exposed to sunlight require high degree of lightfastness. In this study, light fastness and factors affecting the resistance ofthe colour to the light were investigated and suggestions were made regardinghigh light fastness in terms of printability.
关键词:light fastness; blue wool scale; printing ink; colour change; printability