This is black fire. If you mix a sodium street lamp or low pressure sodium lamp with a flame, you will see a dark flame thanks to the sodium and some excited electrons. “It is strange to imagine a flame so dark, because as we know, flames give off light, but the sodium absorbs the lamp’s light.”
In reality, if you shine a low-pressure sodium lamp on a yellow sodium flame, the flame turns black. Flames give off light and heat, so making black fire seems impossible. However, you can actually create black fire by controlling the wavelengths of light absorbed and emitted.
In the center of a very hot fire, you may see a dull orange glow or even an odd dark space. This is called blackbody radiation and is characteristic of very high temperatures (e.g. a feature of stars).
Blue flames are the hottest, followed by white. After that, yellow, orange and red are the usual colors you will see on most fires. It is interesting to note that despite the common use of blue as the cold color and red as the hot color – such as those used in faucets – the opposite is true for fire.
The coldest flame color is black because the flame is so weak it hardly produces any light. Color also tells us something about the temperature of a candle flame. The inner core of the candle flame is light blue with a temperature of about 1800 K (1500 °C).
To create pink flames, sprinkle lithium chloride or a combination of strontium and potassium salts on a fire. It’s easy to make pink flames or pink fire if you apply a little chemistry. Here’s how Pink Flame works and recommends dyes that are readily available and non-toxic.
The color of the flames is also affected by the type of fuel used (i.e. the material being burned) in addition to the temperature, as some chemicals present in the material can tint the flames with different colours. Blue-violet (purple) flames are one of the hottest visible parts of fire, more than 1400 °C (2552 °F).
However you will get green flames if you simply sprinkle copper sulphate on a wood fire or if you use any other fuel except other chemicals in the fuel can add yellow, orange and red to the flame. p>
When temperatures approach 2,400ºF to 2,700ºF, flames appear white. You can see these differences for yourself by watching a candle flame or a piece of burning wood. The part of the flame closest to the candle or wood is usually white because the temperature is usually greatest near the fuel source.
Blue fires can get quite a bit hotter than yellow fires, and they can range from 1400 degrees Celsius (2,550 Fahrenheit) to 1,650 degrees (3,000 Fahrenheit)!
Red flames are generally the coldest, and the deepest reds produce temperatures between 1000 and 1800 degrees Fahrenheit.
A cool flame, or invisible flame, is a flame with a maximum temperature below about 400°C (752°F). It is usually created in a chemical reaction from a specific fuel-air mixture. Unlike a traditional flame, the reaction is not violent and emits very little heat, light and carbon dioxide.
Absolutely warm and cool colors can be found at 0 (red – the warmest colour) and 180 (cyan – the coolest colour) degrees.
In general, the color of a flame can be red, orange, blue, yellow, or white and is dominated by blackbody radiation from soot and steam.
All you need is light salt, which is potassium chloride, and methyl alcohol, which is found in the Heet fuel treatment. Sprinkle potassium chloride salt on a surface, add some methyl alcohol and light the fire. The salt is not consumed by the flame. To get more purple flames, all you have to do is add more fuel.
No, table salt (sodium chloride) is non-flammable. Salt doesn’t melt until it reaches 800 degrees Celsius, which is 1,472 Fahrenheit! Salt boils at 1413 degrees Celsius or 2575 Fahrenheit! And to catch fire, it would have to get even hotter and break down into its individual chemical components.
Copper Sulphate Green Fire
Sprinkle solid copper sulphate on a fire to create a green flame. Copper sulfate dissolves in rubbing alcohol and creates pure green fire. The copper compound is not consumed by the fire, so the color will persist as more fuel is added.
No matter how high the temperature rises, blue and white is the hottest color we can perceive.