Originally posted by scienceguy
So the sparks are pieces of the barrel coming out and burning?
Well, no not really. The barrel is much MUCH harder than the shell of the paintball. Its more of the paintball burning than the barrel. The barrel is just the catalyst.
cat·a·lyst Audio pronunciation of catalyst ( P ) Pronunciation Key (ktl-st)
1. Chemistry. A substance, usually used in small amounts relative to the reactants, that modifies and increases the rate of a reaction without being consumed in the process.
2. One that precipitates a process or event, especially without being involved in or changed by the consequences: “A free press... has remained... a vital catalyst to an informed and responsible electorate” (Robert O'Neal).