Faber-Castell Pitt Oil Base Pencil
From Faber-Castell, we have a slightly different type of pencil. It uses oil rather than wax as the binding agent. The advantage is that this pencil type creates lightfast marks that don't require a fixative.
The three asterisks on the pencil indicate the marks will last over one hundred years in museum conditions!
It also has some interesting properties - sharpening to a point is easy, and that point stays strong - unlike many alternate formulation (pastel, charcoal, etc.) artist-oriented pencils. The pencils are also very smooth and manageable in the hand.
Made with oil rather than wax. Lightfast. Will last over 100 years. These pencils will write on ANYTHING. Most importantly, on OIL PAINTINGS! A must have!