Colored Fire is a common pyrotechnic effect used in stage productions, fireworks and by fire performers the world over. Generally, the color of a flame A flame is the visible (light-emitting) gaseous part of a fire. It is caused by a highly exothermic reaction (for example, combustion, a self-sustaining oxidation reaction) taking place in a thin zone. If a fire is hot enough to ionize the gaseous components, it can become a plasma may be red, orange, yellow, or white, and is dominated by blackbody radiation Thermal radiation is electromagnetic radiation emitted from the surface of an object which is due to the object's temperature. An example of thermal radiation is the infrared radiation emitted by a common household radiator or electric heater. A person near a raging bonfire will feel the radiated heat of the fire, even if the surrounding air is from soot Soot is a general term that refers to impure carbon particles resulting from the incomplete combustion of a hydrocarbon. It is more properly restricted to the product of the gas-phase combustion process but is commonly extended to include the residual pyrolyzed fuel particles such as cenospheres, charred wood, petroleum coke, etc. that may become and steam Steam is vaporized water. It is a transparent gas. At standard temperature and pressure, pure steam occupies about 1,600 times the volume of an equal mass of liquid water. In the atmosphere, the partial pressure of water is much lower than 1 atm, therefore gaseous water can exist at temperatures much lower than 100 °C (212 °F) (see water vapor. When additional chemicals are added to the fuel burning, their atomic emission The two states must be bound states in which the electron is bound to the atom, so the transition is sometimes referred to as a "bound–bound" transition, as opposed to a transition in which the electron is ejected out of the atom completely into a continuum state, leaving an ionized atom, and generating continuum radiation spectra can affect the frequencies of visible light radiation emitted - in other words, the flame will appear a different color dependent upon the chemical additives. Flame coloring is also a good way to demonstrate how chemicals change when subjected to heat and how they also change the matter around them.
Pyrotechnicians will generally use metal salts to color their flames. Specific combinations of fuels and co-solvents are required in order to dissolve the necessary chemicals. Color enhancers are frequently added too, the most common of which is polyvinyl chloride Polyvinyl chloride, (IUPAC Poly) commonly abbreviated PVC, is a thermoplastic polymer. It is a vinyl polymer constructed of repeating vinyl groups (ethenyls) having one of their hydrogens replaced with a chloride group.
Contents |
Flame Colorants
Emitted colors depend on the electronic configuration of the elements involved. Heat energy from the flame excites electrons to a higher quantum level, and the atoms emit characteristic colors (photons with energies corresponding to the visible spectrum) as they return to lower energy levels.
Campfire Colorants
Flame colorants are becoming popular while camping. Scouts and other outdoor enthusiasts have placed sections of copper pipe with holes drilled throughout and stuffed with garden hose onto campfires to create a variety of flame colors. An easier and more accepted method of coloring campfires has been fueled by commercial products. These packages of flame colorants are tossed onto a campfire A campfire is a fire lit at a campsite, usually in a fire ring. Campfires are a popular feature of camping, particularly among organized campers such as Scouts or Guides. Without proper precautions they are also potentially dangerous. A certain degree of skill is needed to properly build a campfire, to keep it going, and to see that it is properly or into a fireplace to produce effects.
Although these chemicals are very effective at imparting their color into an already existing flame, these substances are not flammable alone. To get a powder or solid that, when lit, produces a colored flame, things get a little more complicated. To get a powder to burn satisfactorily, both a fuel and oxidizer will probably be needed. Common oxidizers include:
Potassium nitrate Potassium nitrate is a chemical compound with the chemical formula K (saltpeter)
Really there are a few simple rules for deciding which oxidizer to use when:
1. Metal color:
See also
Notes
External links
Categories: Pyrotechnics
Mid-Hudson News
At the time of the fire a small dark colored automobile was seen in the area, and anyone with any information is requested to call the State Police at ...
531px x 650px | 70.50kB
[source page]
Raptor my dad Yereh the Jackwolf Rider
admin
Sun, 05 Jul 2009 04:45:46 GM
Fire. -i Digital Camera is the best FireWire . Color. Digital Camera available for home/office applications. Its superior VGA picture quality and lightweight housing clearly distinguishes it from other FireWire or USB cameras. ...
Q. According to the light theory, when all of the frequencies of visible light are radiated together the result is white (sun) light. So then, why all the colors of fire are either blue or orange?
Asked by Jake L - Mon Oct 13 22:45:07 2008 - - 2 Answers - 0 Comments
A. all i know is that the blue is hotter than the orangish yellow
Answered by beanpoppy - Mon Oct 13 23:03:52 2008
