The shape of the pen is designed to make the ink flow toward the tip

and seals everything in so your work stays protected indoors or outdoors

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molotow aqua ink pump softliner 1 mm FD The shape of the penBrush pens with pump funktion. Molotow AQUA Ink Pump Softliner is filled with water based ink that is easily controlled by pumping the nib into the top of the cap. The colours can easily be mixed together, but you can also use them with water to thin them out. The pens are refillable, and the nibs are replaceable as well. If your paintings are going to be subjected to sunlight, we recommend that you spray them with UV protective lacquer or fixative,