About a year ago, when KGD Japanese cotton, and Rayon, both were fairly new on the scene, for wicking materials, I bought both. I bought a box of KGD, containing 60 pads; and around the same time, bought a huge box of CeluCotton rayon from Sally's. At the time, on ECF, as well as other forums, there were fairly heated discussions as to which was a better wicking material. Because of the ease of use, I quickly fell into the KGD camp, and remained there. I even took my huge box of rayon to a local vape meet, put it on a table, and told people to snip off a piece, and give it a try. I brought the rest of the box home, shoved it into a shelf in a closet, and forgot about it. But nobody was getting their hands on my precious KGD.
Yesterday, I was looking around for something else, and ran across my box of CeluCotton. For whatever reason, boredom I guess, I got the box down, and decided to rewick one of my Atomics with the rayon. Now, I had remembered reading that the trick with rayon is to use much more of it than you would cotton. The motto among rayon users was: "cotton users generally use too much. Rayon users use too little." So, with that in mind, I carefully and gently created a piece thick enough to where I could barely pull it through my 2mm coil, without distorting the coil. The piece was probably the size of a pencil.
After squonking it up, I took a hit, and WHOAHH...this stuff is good! The flavor is crisp. Vapor is great. With big, long drags (as big and long as my old lungs could muster), not even a hint of drying out my wick.
My conclusion: Rayon works every bit as well as KGD, vapor and flavor wise. The downside: Rayon takes a little more fussing around to get the amount right. KGD is much easier to work with. No doubt about it. Can I say that one has an edge over the other? No. But for a confirmed KGD user, I'm glad I took another look at rayon.
I agree, Rayon is a good wicking material @Rule62 - and needs to be packed tighter like others have said
I also agree with your comment that it leads to a "crisper" flavour. Somewhat sharper.
For my tastebuds I like the Rayon crispness for my menthol juices. Have it in the Nuppins for my menthol fruity lung hits and in the RM2 for the menthol fruity vapes
For my tobaccoes, i somehow still prefer organic cotton. But I do find a lot of gunk buildup with the tobacco vapes.