Use core-spun threads (polyester core with cotton wrap) or reduce top tension to 30-40 grams. The thread must break before the fabric, or you have a design crack pending.
Tiny micro-fibers break off the main thread, creating a frosty or "cracked" look on the surface. rayon design crack
The result is a distinctive "straight-line" fracture along the warp yarns, colloquially known in the industry as rayon cracking. Use core-spun threads (polyester core with cotton wrap)
It provides a vintage or industrial look to otherwise fluid and soft rayon clothing. rayon design crack