
Colour fade is inevitable, but it is also quantifiable! It is important to be able to give a value to represent how far colours will fade over time.
We specify a minimum of a Blue-Wool-Scale index of 7, and try to use 8 where possible for outdoor labels.
A useful article on how the Blue Wool Scale is used:
http://www.epson.com/community/primelabel/wp-content/uploads/sites/7/2014/04/TechInfoLightfastPaper0109.pdf
