Bleeding is most likely to happen on loosely woven fabric, so selecting a tightly woven fabric will limit your bleeding. Ironing your fabric before drawing can also get rid of any bumps that may cause your markers to catch and bleed in the process. Additionally, some artists recommend lining your designs in gel pens to prevent bleeding. It also helps to ensure you are using the best fabric markers for your project, which goes back to compatibility. The more suited your fabric markers are to your fabric, the less you will have to worry about bleeding. Overall, you want to be confident in your strokes. Pausing between lines can cause blots that take away from the overall design.