Yes, they mark on fabric, have a variety of colors and nib sizes and do not dry out too fast. But will they really disappear?
The Frixion pens I have purchaced have a rubber tipped end, to use as an eraser, the idea being the ink disappears with the friction of rubbing (hence:Frixion, get it?). Since friction causes heat, heat should also cause the ink to disappear, thus yet another use for the iron. BUT: will the ink come back if the quilt gets cold?
I know, I've been snarky with this question before (who stores quilts in the freezer?), but upon reflection, this needs to be answered. If you enter quilt shows, sell and/or ship quilts, they are exposed to temperature extremes during shipping. The unpressurized hold of an airplane gets mighty chilly.
So, to see for myself, I performed an experiment.
Using 4" squsres of Kona cotton, I labeled my trials (using a standard, permanent Sharpie), both Starched & Unstarched. See, I had heard (somewhere, but I can't. remember where) that starching first will prevent the ink from reappearing. Then, I marked each with my Frixion pens: black, blue and orange.
Then I ironed. With steam.
And stored in my freezer for a couple of hours.
Finally, I washed my samples, in the washer with Tide detergent.
Results?: yes, the iron removes, but yes, the cold causes reappearance. Washing helps the ink fade, but I still see a faint trace in all three colors.
Will I use my Frixion pens to mark my quilts? Just my practice stuff. Any thought or experiences to share?