The most neutral flavor I have experienced is actually the bon 60 grit aluminum oxide. That stuff was mind blowing once I got the wire Ga/resistance-wick diameter-coil height ratio right. There's a balance between VP, heat sink of the ceramic mass, saturation of the wick, and air flow that must be done right, but that white wick is at the top of my list. I'll post pictures after this calculus II exam nightmare is over on wed 8-o . Worst class I've taken(so so professor and haven't taken calc I in 2 years) and I loved organic chemistry.Thanks your remarks Meta. I generally agree with your conclusions. I've been doing a six month informal scientific inquiry of consumer rebuilding methods and wicking products. So far over 350 builds. Nextel resides as the de facto standard to beat at this point with these tests displacing cotton early on. It has a deficiency in that it falls notably behind in its cross-section saturation because of the very properties that makes it flow as exceedingly well as it does. Consequently it excels no doubt in some drippers but others where there is no well such as the Immo (I test 4) it does not fare as well requiring more dripping. It's flow rate is unequaled. So I'm very optimistic about use in a Genny.
I am flavor sensitive. A blessing and curse. So I can distinguish between silica, Ekowool and Nextel in that all three have a distinct flavor signature. Those reporting an inferiority of flavor have not had sufficient long term experience with the [Nextel] wick I believe. Many conditions can affect the flavor result of all synthetic media including the method of preparation. When properly prepared Nextel is the most flavor neutral of all the media from all sources I have tested. It does have a break-in time (brief, tip. <half mil) and certainly after torching/pulsing as any synthetic does. However, no other wick media has the potential for single-coil long term usage of Nextel.
Meta I found that stubborn surface ash, usually bars at either side of the coil (if a micro) as surface debris. This can be usually eliminated by a narrow and brief small torch burn right on a clearo without hazarding any nearby silicone. It doesn't substantially heat the head assembly. Then the wick coil can be restored to practically match any flavor or juice channel wicks in their pristine white color. It's not perfect as you have pigment particles interspersed in the weave due to wicking and these can't be totally removed. Especially if they are allowed to accumulate. As time goes by this is what disrupts flow and mutes the flavor requiring another 3/8" or so of more wick in most clearo's. I recommend a procedure in my blog to ...... this which absolutely works. And all techniques I've described elsewhere can have a typical tank running out two weeks or longer. After repeated washes and burns though this interval is shortened.
Pic's of a typical contact (micro) coil from these tests in a long burn with wick heated, illuminated; and, Nextel install with attendant juice channel wicks to help mitigate flange bypass of juice…
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This product is about one of the best kept open secrets there is meta. And really impressive combined with the use of an actually functional microcoil for its efficiently uniform operation. When that happens Nextel is IDEAL…for durability and you will experience virtually no ash in liquid or discoloration. However, I find no substitute for cotton overall for its capacity to convey the broadest possible flavor. Nextel sometimes may equal it or come close but its not a substitute. Unfortunately for me as a user I can always taste cotton as a competing flavor. It never hides in the background and so is imposing. I'm sure there are many like myself which makes Nextel a very interesting alternative worth trying.
Thanks again for taking the time to ad your observations. All confirmation is helpful and exceptions worth exploring.
Good luck all. Enjoy.
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