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from: Where Colors of Fireworks Come From
When we see a fireworks display, we get to wonder how that came to be and how a mere powder produces sparkling colors that are so awesome and fantastic to look at.
Colors in fireworks are usually generated by pyrotechnic stars–usually just called stars–which produce intense light when ignited. Stars contain five basic types of ingredients: the fuel which allows the star to burn; an oxidizer; color producing chemicals, a binder which holds the pellets together; and a chlorine donor which provides chlorine to strengthen the color of the flame. Sometimes the oxidizer can serve this purpose.
The brightest stars, often called Mag Stars, are fuelled by aluminium. Magnesium is rarely used in the fireworks industry due to its lack of ability to form a protective oxide layer. Often an alloy of both metals called magnalium is used
Below is a list of the common colors used in fireworks and the compounds that give off a specific hue.
1.Red . This color is achieved by mixing either strontium or lithium salts to the gunpowder. Strontium gives off a bright shade of red while lithium a fainter one.
2.Gold. If you want a golden glow in your fireworks, mixing iron, charcoal or lampblack will produce a golden light.
3.Blue. If you are aiming for a blue color, this can be produced by compounds such copper compounds combined with a chlorine producer, and copper acetoarsenite.
4.Purple. Most of us, or may be a few of us loves purple. Mix strontium (the compound that produces red) and copper (compound that produces blue) and you have yourself a purple flash of light.
5.Silver can make you an imitation of the color of lightning, add either aluminum, titanium or magnesium to the mix and you will have silver.
There are other compounds added to regular gunpowder to produce different-colored fireworks. The ones listed above, however, are the most common. Bear in mind though that you shouldn’t try mixing them with gunpowder by yourself, unless you are guided by a professional or a professional yourself. Mishandling fireworks can be potentially dangerous not only that it can cause injuries when lighted but highly poisonous as well.
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