Re: When doing 2 color changing round stars, is there a rule of thumb on outside's color thickness to inside's?

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I'm trying my hand at small color changing stars.
Doing a ruby red/emerald green metallic that uses Strontium nitrate,
barium nitrate as only differences in comp.
Used red as a coreless with NC, to around 3/32-5/32 round dia.
To get equal amount of time per color would it be : core dia=outside
layer thickness?
Not using changing relay either 'cause I don't think it would lite the
red, so choreography is out the window.


Lacking containment, and given the nature of your comps, the comps should
both burn at the same linear rate; i.e. each should burn, say, a 1/4" of
thickness of comp per second.

The problem with that (using identical burn-rate comps for multiple
layers) is that the smaller "core" color will appear dimmer than the
larger overlay.

To equalize perceived brightness of the two colors, one must use a larger
but faster-burning inner core color.

I have no doubt that KP prime used as a relay would light that red. It's
not exactly dark, but has a low enough light output to be obscured by the
brighter nitrate/magnalium colors (I assume you're using MgAl for the
metal).

LLoyd
.