For many special applications such as coated surfaces, nano coatings, optical glass, laboratory glass | Also for use on silicone, laminating film and newest generation of optical glass | Adheres to many special surfaces which other markers do not adhere to | The black Lumocolor permanent special can also be used for textiles and wide variety of outdoor applications | Excellent smudge-proof and waterproof qualities on almost all surfaces | Dries in seconds, therefore ideal for left-handed users | Colour-intensive, low-odour | Extremely lightfast and weatherproof | Airplane-safe - automatic pressure equalization prevents pen from leaking on board aircraft | PP barrel and cap guarantee long service life