ckcowl

frixon pens are made by Pilot, they are an erasable pen- many people would rather use a pen instead of pencil but want to be able to erase mistakes so pen companies came up with erasable pens- Frixon is one. They were never meant to be used by quilters- they were made to write on paper, and erase if you need to. Someone at some point a few years ago used one to mark a block ( or something) then they ironed it and the mark disappeared- they became excited by this- shared the news and it spread like wild fire- all of a sudden quilters started buying them and using them to mark quilts- then became upset with the company when lines reappear or light lines were left on dark fabric
they were never meant for this use- they were made to write on paper- a smooth writing pen in many colors which could be erased