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2. Bunsen burner - Wikipedia

   en.wikipedia.org/wiki/Bunsen_burner

   The yellow flame is considered "dirty" because it leaves a layer of carbon on whatever it is heating. When the burner is regulated to produce a hot, blue flame, it can be nearly invisible against some backgrounds. The hottest part of the flame is the tip of the inner flame, while the coolest is the whole inner flame.

3. Kerosene heater - Wikipedia

   en.wikipedia.org/wiki/Kerosene_heater

   The Japanese non-vented "fan" heater burns kerosene gas and is known as a gasification type heater. The liquid kerosene fuel is pre-heated via an electric heating element to vaporize the fuel. The resulting gas is collected and forced into the burn chamber where it is ignited and burns with a blue flame, similar to propane.

4. Colored fire - Wikipedia

   en.wikipedia.org/wiki/Colored_fire

   Flame coloring is also a good way to demonstrate how fire changes when subjected to heat and how they also change the matter around them. [1] [2] To color their flames, pyrotechnicians will generally use metal salts. Specific combinations of fuels and co-solvents are required in order to dissolve the necessary chemicals.

5. Do I need to worry about space heaters? Here’s what experts ...

   www.aol.com/lifestyle/worry-space-heaters...

   "These heaters meet specific safety standards." The main takeaway. Space heaters can and do cause fires, making it important to be mindful about how you use them. However, experts say it's ...

6. 7 Space Heater Safety Tips You Absolutely Need to Follow This ...

   www.aol.com/7-space-heater-safety-tips-113600623...

   Are Space Heaters Safe to Use? According to the National Fire Protection Association, heating equipment is a leading cause of fires in U.S. homes with an estimated average of 44,210 home fires ...

7. Oxidizing and reducing flames - Wikipedia

   en.wikipedia.org/wiki/Oxidizing_and_reducing_flames

   The color of a neutral flame is semi-transparent purple or blue. [1] This flame is optimal for many uses because it does not oxidize or deposit soot onto surfaces. Bunsen burner flames with different oxygen levels: 1. diffusion flame, 2. reducing flame, 3. fuel-rich neutral flame, 4. neutral flame