It says the 440 has a color tint to it. Let us know if it changes to pure white after you burn the sizing off. If it does then the color burned off also and if it doesn't then I hope the color is imbedded in the ceramic and not something that can be inhaled by the user.
Ace, the sizing is tinted. In their technical notebook, it says after it is heat treated it will be pure white in color. They color the sizing depending on what material (nextel 312, nextel 440 nextel 610 etc).
Imeo, It's very important to be safe. I've spent hours and hours researching this before I decided to try it. I'm not willing to risk my health on a whim. It is a very important point to remind people that taking things at face value isn't always a wise idea. Everyone trying anything that Imeo hasn't researched, needs to be very diligent in their research. Everyone in the GG community (and the vaping community as a whole) needs to be, and remain, healthy and happy.