These pens were not designed to be used on fabric and Jennie points out why.
A warning about these pens which seemed initially to be such a great idea for quilters. They were designed for the paper trade and while they seem to do what they say on fabric i.e. disappear when heat is applied – there is still a chemical residue.
The manufacturers have indeed now put a warning on their packaging – so you too have now been warned – take care – Rember your quilt is precious.