Review on Set of 4 Heat Erasable Pens + 20 Refills for Sewing, Quilting, and Dressmaking - Convenient Fabric Marking Tools by Gelin Battle

These are great pens and with so many interchangeable heads this is a good buy for me. Yes, they do. When you load the pen with a new lead, the white cap on the tip of the lead is removed FIRST. THEN put the refill in the keg and then put on the cap, it's that simple. The white cap is designed to prevent the gel from spilling out of the tip in case of an accident, and also protects the ball if you drop it. The white color is a bit strange if you have never used white handles on fabric. . I usually have a small piece of fabric nearby to get the ink flowing, and then I use a pen. The marks will NOT be as noticeable at first, after they have cured they will become stronger. If you need to make a heavier mark, wait for it to set and then put another mark on top of it. I had very bad white spots, they work, you just have to be patient. They are 100% cotton easy to remove and the marks will NOT come back, I haven't had any marks yet and all I use for my quilts is 100% cotton. I will not claim anything other than 100% cotton, if you have a poly blend or even silk you must test the handles on the fabric first before beginning. Traces are removed by either dry heat or steam. This is especially valuable for quilters. How we managed to survive the chalk era I don't understand, now I will never use anything but these pens again.