Street Killer Ink or the Full Metal Paint

covering both background shading and tighter detail work without switching tools

Each pen can be filled with pretty much any liquid ink or water-based paint

45 mm — comic outlines

A rigid cardboard backing makes the pad usable as its own drawing surface anywhere

molotow blackliner pen round tip Idwrap Street Killer Ink or theThe Molotow's Blackliner pens are filled with black permanent pigment ink and are perfect for drawing outlines and details. The ink is waterproof and is classified as "archival ink" with high lightfastness. Like most of Molotow's products, these are also made in Germany.