I have used the clover chalk markers many times...But I machine embroidered a dozen napkins and had problems...You have to place a mark for the center of the designs to stitch...I have tried all sorts of stain removers, but the marks won't come off...It was a set of polyester napkins...They were to be a gift, But I had to keep them and make another set...I used a blue water soluable marker for the second set...
Have any of you had any problems with markers....I have even used the chalk marker to mark quilts and never had a problem...