Stabilo Pencils are used to mark alignment points on glass and other smooth surfaces so that large graphics may easily be applied level. A water soluble pencil that will mark clearly on glass, acetate, metal, and film. It wipes off with a damp cloth from smooth surfaces. Rvinyl offers two a graphite colored pencils. Light colored surfaces are marked with a graphite / navy color or a white colored pencil may be used for marking of dark application surfaces. ...