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What Are the CoLoUrs of a Fire & How Hot Are They?

When you think of a typical controlled fire, such as a campfire or bonfire, many of the adjectives that come to mind probably concern heat and temperature: Hot. Roaring. Roasting. On the other hand, you may have a number of visual impressions, too: Sparkling. Shimmering. Dancing. Just as colors appear in a variety of hues, intensities and on physical media such as painting and clothing, they can also present the same apparent range of visual "flavors" when the medium is what you know as fire. This makes sense, since fire is just . . . really hot light. Or is it? Flame Color Temperature Chart While sources vary somewhat, it is possible to construct a reliable enough chart showing the relationship between flame temperature and flame color across the visible light spectrum. Dark red (first visible glow): 500 to 600 °C (900 to 1,100 °F) * Dull red: 600 to 800 °C (1,100 to 1,650 °F) * Bright cherry red: 800 to 1,000 °C (1,650 to 1,800 °F) * Orange: 1,000 to 1,200 °C (1,800 to 2,100 °F) * Bright yellow: 1,200 to 1,400 °C (2,100 to 2,500 °F) * White: 1,400 to 1,600 °C (2,500 to 2,900 Temperatures high enough to produce blue flames are unusual in campfires, which is why they are more often seen when metals are used, as in welding,

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