lightfastness

Also known as lightfast, fastness to light, light fastness

thumb|Clay earth pigments such as [[burnt sienna often have a high lightfastness]]

~9 min read

Article

12 sections

Contents

Chemical processes
Photolysis
Photo-oxidation
Photoreduction
Photosensitization
Phototendering
Standards and measure scales
Test procedure
In graphical industry
See also
References
External links

thumb|Clay earth pigments such as [[burnt sienna often have a high lightfastness]]

Lightfastness is a property of a colourant such as dye or pigment that describes its resistance to fading when exposed to light. Dyes and pigments are used for example for dyeing of fabrics, plastics or other materials and manufacturing paints or printing inks.