marking pen mishap---UPDATE
I marked a quilt block with a Dritz purple air soluable marking pen that the color dissapears as it dries. I pressed the block anf the purple mark came back when I ironed it and it would not go away. I learned a new trick today! I used Biz! I used a very small amount of the powder and added a smige of water to make a paste. Then I used a q-tip to dob it on the purple line and let it sit a while. It started to dry to a white powder again. Then I rinsed it off and rubbed a bit and the mark is gone!!!! I thought maybe someone would like the tip...just in case. Thanks for all the suggestions I recieved.