When you light a ping pong ball, it creates a big flame that lasts for a few seconds. Why carry out they carry out this if they're just made of plastic and also air?


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Ping pong balls are made from celluloid, which is itself flammable. When you light the round on fire, it heats up. In the internal, the celluloid evapoprices and also jets out of the aperture burned in the round, and also it makes a bigger flame. Most plastics are flammable; celluloid is chemically equivalent to guncotton, which is explosive.

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To expand on this, celluloid isn't supplied much anymore, bereason of its flammcapability, but ping pong balls still usage it. The factor it's so flammable is because of its nitro teams, which release oxygen when they're heated. This capacity to release oxygen is what makes ping pong balls burn more strongly than practically any kind of other polymer.


Interestingly, the Internationwide Table Tennis Federation is switching from celluloid balls to plastic ones. This adjust is rather controversial. I think the adjust is urged by comes to about the availcapability of and eco-friendly affect of celluloid, but I couldn't find a source for that. The official rules for balls carry out not specify a material, but they carry out specify dimension, hardness, and also bounce elevation. Here's an ITTF research comparing the celluloid balls via the brand-new ones. Unfortunately, it does not investigate the flammcapability of the brand-new balls.


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level 2
· 8y
So they're made of movie reels? So that implies obtaining rid of the nitprices in them didn't perform anything.


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level 2
· 8y

Has tbelow been attempts to make them out of various materials? I would certainly have actually thought that somewhere they were considered "unsafe", pressuring providers to come up through something much less flammable.


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level 2
· 8y

Does the amount of press inside a ping pong sphere contribute to it as well? I'd think that there's many push inside one.


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level 1
· 8y
Not a direct answer but something I'm sure you'll discover amazing.

If you wrap a ping pong round in tin foil and also leave a small leave hole, the celluloid turns into a gas and also creates a smoke bomb. The gas however is very flammable and deserve to be lit.

http://www.youtube.com/watch?v=OSxxXiBG9nA


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level 1
· 8y

I'm assuming you watched this video (connect for those curious).

Since, the answer was literally in the summary, and also he did a really excellent job. I'll c/p it for you:

Why Do Ping Pong Balls Burn? Old ping pong or table tennis balls would certainly periodically combust or explode when hit, which created an interesting game! Modern balls are less sensitive, but if you take a lighter to a ping pong sphere, it will certainly burst into flame, burning like a tiny flamethrower. Do you recognize why ping pong balls burn? Here's the answer.

Some civilization think ping pong balls should be filled through some flammable gas, yet they only contain consistent air. The key to the spectacular method they burn is in the complace of the actual sphere. Ping pong balls burn bereason they are composed of celluloid, which is favor gun cotton or nitrocellushed. It's extremely flammable. The old balls consisted of acidified celluloid, which came to be significantly unsecure over time. The slightest spark or heat from friction might ignite these balls. How To Ignite a Ping Pong Ball You have the right to try this task yourself. All you need is: ping pong round lengthy taken on lighter fire-safe surface

If you look roughly online, you'll see civilization lighting ping pong balls while holding them. Usually what they are doing is lighting the sphere from the peak. No issue wbelow you light it, the majority of of the warm escapes above the ball, but they burn so swiftly, it's a poor principle to try to hold one. You'll almost absolutely burn yourself, plus you could capture your clothing or hair on fire. Also, tright here is a chance the sphere might explode, which would spcheck out the flame and also may cause injury.

A much better method to light a ping pong round is to set it on a fire safe surface (e.g., steel bowl, brick) and light it via a long-tackled lighter. The flame shoots up fairly high, so don't lean over it and also carry out store it away from anypoint flammable. It's ideal to do this outdoors, unless you desire your smoke alarm to go off.

A variation of the task is to cut a hole in a ping pong ball and light it from the inside via a enhance. The sphere will disincorporate while you watch.

See more: When The World Is On Your Shoulders, By Gu8 On Amazon Music

How Ping Pong Balls Are Made A regulation ping pong sphere is a 40 mm diameter ball with a mass of 2.7 grams and a coeffective of restitution of 0.89 to 0.92. The ball is filled through air and also has actually a matte complete. The product of a consistent round isn't stated, but balls generally are made from celluloid or an additional plastic. The celluloid is a composition of nitrocellulose and camphor that is developed in a sheet and soaked in a warm alcohol solution until it is soft. The sheet is pressed right into hemispright here molds, trimmed, and also enabled to harden. Two hemispheres are glued together using an alcohol-based adhesive and also the balls are machine-agitated to smooth the seams. Balls are graded according to exactly how evenly weighted they are and how smooth they are. Part of the factor people may think the balls are filled via a gas various other than air is bereason the plastic and also adhesive off-gas right into the interior of the ping pong ball, leaving it through a chemical odor, comparable to that of photographic film or modeling glue. Based on the likely composition of the residue, reports that inhaling the gas inside a ping pong ball produces a "high" may be justified, however the vapors almost definitely are toxic, even though the ping pong round itself is not. While tbelow is no ascendancy that the balls be filled via air, it's the easiest indicates of production them and there hasn't been a factor to develop the balls filled via various other gases.