If you want to increase the intensity of the edding 4500 textile markers or edding 4600 textile pens, just slow down a little when drawing or writing so that more ink goes onto the fabric. As you do this, make sure the ink doesn’t show through too much or end up in places it shouldn’t!

Another option for many materials is to apply the ink multiple times, but remember to leave out the heat fixing by not ironing between applications.