The ink is available in an attractive glass with the finely fluted surface: unmistakable style of Graf von Faber-Castell, or also available as a cartridge. The end consumer has the choice between six colours, which have been inspired by nature: Carbon Black, Cobalt Blue, Hazelnut Brown, Stone Grey, Moss Green or Garnet Red color. They are distinguished by a very unique colour depth and are partially document proofed (Black, blue, green and grey).