when paper changes color for no reason
like say if there's some ink on the paper,and the paper gets wet then it will change to the color of the ink
hey look at that paper...
WTF it changed color
yea that's Chromatography
Chromatography is a chemical method to find out the type and/or the amount of chemical substances in a gas or a solution.
The main principle of chromatography is that the gas/solution slowly spreads over a "stationary phase" (for example a piece of paper). Since different substances travel with different speed, the compounds of the gas/solution split up while spreading through the stationary phase and can be measured seperately.
Guy: "Hey, what kind of stuff is in those gas cylinders?"
Scientist: "Let's do a chromatography to find out".
Scientist: "Okay, that gas consists of 60% nitrous oxide and 40% hydrogen"