Lightfastness prismacolor col erase pencils.

Thanks. Sorry for the doubles on the color list.

This is great question! The Verithin pencils are made with the same pigments as their counterparts in the Prismacolor Premier line: the only difference is in the type and amount of binder and fillers used, which make the Verithins harder than the sofa-core Premiers (so they are better at very fine detail work). Since the pigments are the same, though, you are, in general, safe in assuming that Prismacolor’s lightfast ratings for the Premier pencils will be very similar for Verithin pencils that have the same color names. The lightfast tests that Prismacolor performs under ASTM standard D6901-15 are more rigorous than the tests CPSA performs under ASTM 5383-16, so using the information that Prismacolor provides on their webiste is an excellent choice. If you are concerned that the colors you want to use do not rate in the “excellent” or “very good” range, you can at least try to increase their longevity by working only on acid-free paper, framing with conservation-quality materials, using a UV-blocking final fixative, and framing with UV-blocking glass or plexiglass. Hope this helps! Deborah Maklowski, CPSA, CPX, Product Research Director, CPSA.

Sorry I don’t know if I was clear, I was asking about the col-erase line specifically. Would the colors in the col- erase line be using the same pigments as well? How does the erasable formulation affect lightfastness, if at all?