When you order your custom printed napkins, make sure the company is using food safe ink. We at BalloonsTomorrow.com use and recommend food safe inks. Food safe inks should be used when printing on napkins because napkins come in contact with food and humans. One downside to using food safe ink is that the image printed may not be as bright or vibrant as expected which may make some customers unhappy. White ink may fade and not be as white or vibrant as expected on dark blue, brown, or black napkins, but in the end you have the peace of mind knowing that the ink is food safe. Safety is more important than looks.