Why do ashes turn white on black things, but black on white things?

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Why do ashes turn white on black things, but black on white things?

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Anonymous 0 Comments

Ashes are a mix of calcium compounds (a white powder) and carbon (a black powder), along with some other stuff. It’s generally a bunch of flakes which range from white to black and a full spectrum of gray in between.

On a white surface, the darker particles are visible. On a black surface, the lighter particles are visible.