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A discoloration star is a thing of the fireworks which change a color from the middle. The difference in a color is a difference in raw material, As for red systems, such as acid copper, carbonic acid strontium is used, and, as for the blue system, as for the yellow system, calcium carbonate etc. is used, It is said that the fireworks which change a color by these order to mix and an order of being lit are done. |