I'm not sure how that would work; for instance, colours produced by a cloud of metal ions will require heat to actually produce the light. This heat will have to come from somewhere.
If the metal (a metal chloride?) doesn't provide its' own heat, it will need heat from the reaction around it, slowing it down.
Even an relatively inert metal oxide will cool the reaction to accept enough heat to glow brightly.
Exactly. Until there is a metal that incandesces a color wavelength other than silver/gold/orange/dull red as it cools, or a charcoal that smolders a color other than orange, I don't think true color tail is physically possible.
The nice blue, red, & green colors result from the (generally) monochloride ion of the metals, which won't leave a visible tail, for cooling the way E.B. describes. The Kosakane's, T. Shimizu, Lancaster, Oglesby, and Winokur, who all know what they are about, have worked on this problem for decades, and learned much about color generation, but no one has made a true colored tailed star
( without microstars in a dark matrix ) or colored glitter, that has been puiblished.
