These two types of papers are mostly used on the fabric pleating machines. Gsm usually ranges from 25gsm to 48gsm.
Plain paper surface is smoothy and less friction.

Friction paper has a abrasive surface and it is flexible when you stretch. So it is appliable for bamboo pleat pattern, wave pleat patterns. And also, it performs better than the plain paper on pleating some very slippery fabric.

Proper GSM and ingredients of the paper enable itself to be re-used repleatedly on the fabric pleating machines