Fill it with Molotow ONE4ALL acrylic refills

The pen is entirely made of metal and has a 3 mm (1/8") metal ball at the tip that can withstand even the toughest surfaces

so it's safe to lay watercolor or Copic marker washes directly over finished linework without the ink bleeding or lifting

Which grade should I choose

This issue features writers such as: True

talens 064 concentrated fixative spray 150 ml multivariantcolorpicker Fill it with Molotow ONE4ALLThe Talens 064 is a ready to use aerosol version of Talens' fixative, more concentrated than the standard 061 formula it anchors loose pastel, charcoal, chalk, or graphite dust onto paper in fewer passes than a less concentrated spray would need. Like the liquid formulas, it's also a fix for "blooming," the cloudy white wax film that builds up on heavy colored pencil layers over time: a light pass breaks it down and restores the contrast the drawing