With these 5 Infusible Ink markers, let your imagination run wild They are perfect for writing, drawing, or decorating, either by hand or using your cutting machine. The advantage of these pens is that you can use them on iron-on paper as well as ordinary paper. The result is clean, crisp and smudge-free and washable. Please note that the Infusible Ink technique does not work on cotton. Make sure you use polyester. See also the rest of our range of pens and markers Pack size: 20.3 x 10.2 x 1.3 cm. 1 mm tip. These markers comply with the ASTM D-4236 standard. Cricut reference: 2006256