Nowadays when I ask my staff to make pom pons for a fringe, or for the ends of embellishments or tassels, we start by pulling out hundreds of threads in a variety of colours, bunching them into an inconsistent rainbow. For 350 pom pons one requires about 3.5 meters bunched variegated threads.
The trick to making the pom pons is to tie this bunch of threads very tightly, and at a consistence distance apart. Once tied and cut, trim them into the perfect pom pon shaped ball, consistent balls in size and shape. Sharp scissors are essential, but even more so, this tour de main is a hard-learned skill.
After a fringe is woven on the loom, we attach a pom pon to each individual loop. Alternatively, use pom pons at the base of a beaded tassel.