Light-fastness:
Works of art are valuable pieces that are one of a kind and should be preserved at their original degree of quality for as long as possible.
Therefore, FABER-CASTELL insists on using selected natural ingredients in the manufacture of its artists’ colour pencils – especially high grade colour pigments of the highest purity and light-fastness.
FABER-CASTELL was the first producer in the world to label light-fastness ratings of its pencils with specific asterisks:
*** Greatest light-fastness (= no change after sun exposure)
** Very good light-fastness (= little change after sun exposure)
* Moderate light-fastness (Caution: definite change after sun exposure)
This division into various categories is a classification initiative by FABER-CASTELL and to date there is no internationally standardised equivalent.