The way a fabric burns depends in part on what it is made of. Just in case there is another costumer out there that makes costumes for fire twirlers this table describes burning characteristics of fibres and ranks them from the most to least hazardous.
On another note completely my daughter Eve (the fire twirler, stilt walker and clown in the family) has the images from her tour online. There are a number of new galleries to poke about. This Aussie lass sure gets around. In 12 weeks the ground she covered was exhausting. She started with the Thames festival, the Towersey festival, and the Wallinford Bunkfest. Take a look at Eve walking tall at the Mull of Kintyre festival and the Workhouse festival.
Eve also went to Ireland Will-o’-the-Wisp stopped in Bangor, Dublin, Tara, Cork, and arrived in Millstreet just in time for the European Juggling Convention. In Scotland at the Lock Lomond festival Eve was dancing on stilts and was also dancing on stage at the Wickham festival.