Originally Posted by
QuiltnNan
they do disappear. but sometimes when marked on dark fabric, ironing it will leave a white line behind. best to test your fabric.
This sounds more like what happens with frixion pens. Depending on the brand of air erase pens you have ironing can indeed set the color. From Dritz FAQ page:
Ironing over marks may cause the ink to penetrate deeper into the fibers so that the ink is more difficult to remove. Excessive heat may cause the marks to set. - See more at: http://www.dritz.com/education/quilt....pV8Ghaiw.dpuf