As ink flows more freely in markers than in other pens, feathering is a serious concern. How much an ink feathers depends on a combination of the ink formula and the paper used. We usually use marker-friendly paper like Rhodia and Kokuyo , so we don’t experience much feathering unless we linger on a word or point.

Water/Copic Resistance

Water and Copic resistance is important if you use your markers with other tools, such as water brushes or Copic pens (alcohol-based ink). An innocent swipe of a wet brush or Copic marker may result in a muddy mess if you're not careful.

If you’re planning to work with water, make sure that the marker that you’re using is water resistant or waterproof. When exposed to water, “water-resistant” inks may run or fade but still remain legible. Waterproof inks are completely unaffected by water.