Please dont say this. I dont want to think about whether Rayon is safe, nor do I want to remember its manufacturing process and all the chemicals used.
I dont want to because it is hands down AWESOME as a wicking material. But I hear you. Im still unsure whether I will buy more after my sample runs out. I was hoping it would be so-so and so Id have a clear path just using organic cotton, but of course it completely rocks as a wick.
There is a thread on this forum about Rayon. Many people have gone to great lengths to determine whether its safe. The general consensus is that it is- its basically man-made cotton. The reason its better than cotton is because rayon is literally strands, where cotton goes every which way. Cotton is better at holding juice, but it doesnt wick as quickly and it doesnt let go of liquid as fast. As a result Rayon can be run with higher wattages (due to more liquid being released, hence more vape, quicker coil warm-up, etc) and is better at chain vaping, it offers no break-in period, it lasts 3 times longer. The manufacturing chemicals that people dont like are washed away from it after its made.
Could trace amounts still be there? I dont know. Are they harmful when burned? I dont know. Would rayon even burn at all as long as the wick is wet? I doubt it. Would the chemicals in the rayon be absorbed by the liquid and then vaporized? I dont know.
It scares me. Makes me want to change out my Rayon wick for cotton right now actually. The local vape store looked at me like I was insane when I mentioned rayon. But damn.. the stuff works soooooo good. I feel like its turned my Kayfun/MVP into a DNA30/dripper, though I know thats an exaggeration.
For a TON of info on this, see:
http://www.e-cigarette-forum.com/fo...ck-better-flow-flavor-saturation-nic-hit.html