This Micron Pigma Pen set offers a beautiful selection of earth-tone colours! Colours included in this set: Sepia, Royal Blue, Burgundy, Hunter Green, Blue/Black and Fresh Green in the popular .05 size. Waterproof and chemical proof. They are excellent for drawing, graphics, documents, outlining and lettering work. For best results spray with a matte varnish after using so that the ink won't smear if varnish is brushed on. Note: When not using these pens ensure that the cap is on tight. These pens have a felt tip so remember not to press too hard or the tip may bend causing ink flow to stop.