There are 2 types of Frixion pens:
- Ball Point – I use these for marking patterns and embroidery (because you can hide the marks with stitching)
- Gel – I believed these to be safer for marking material and the research showed this to be correct. This post has moved to https://letslearntosew.com/using-frixion-pens-in-sewing-and-pattern-making/