With its specific cartridge design, the ink lays down smoothly, dries fast and won't smear on the paper.
We know it's frustrating for your pen ink to run dry and have no pen refills available, or even know what pen ink cartridges you need...not to mention refill instructions in this "disposable" society.
The description data of all pens clearly state the style of refill required. Pen ink color variations are available, and can be selected by the drop down "option" menu under the applicable refill cartridge type.
Ink Refill Instructions are provided with each pen sold. Our refill instructions are detailed and literally tell you "twist here" or "hold here".