Then you should have no issue with colors

What I can tell you, is that the yellow on my spice ARE oils, as they disappear in Rx.

Now what's in this oil ?

Good question, but I'm using hexane and it's not supposed to dissolve n-oxides...

[edit] Just did a quick test with yellow spice, works as good. No traces left on the surface either.

Not as harsh as I thought initially, the vapor might be a little hotter than the GVG though.

Somehow, I knew you'd say that

And BTW, I'm not doing these tests on my GVG. The Health Stone Handvape was designed to vaporize from the top though, so I AM using that one as intended. I only switched the nature of the chemical being vaporized