Okay my parents couldnt give me a deep enough answer...?
P.S.----sorry if i spelled stuff wrong..im really smart but not the best speller :)
Answer:
The answer is alcohol. Nail polish, for instance, contains a high amount of alcohol (really the majority of the liquid base) and when the alcohol comes in contact with the air it begins evaporating (not from friction, which creates heat and excites molecules into a gassius form like in boiling water.) When the alcohol has fully evaporated the remaining substance is the hardener, activated and hardened by the evaporation process, and the coloring. As for the actual chemical reason why the alcohol evaporates I am not entirely sure but I know it has a lot to do with the substance forming a bond with the air. Hope this helps.
try evaporation
Nail polish is a bunch of pigments in a volatile solvent. Blowing on the polish helps to make the solvent evaporate faster, causing the pigment to set.
What happens when you blow on wet stuff like nail polish, is the solvent in the nail polish goes to a vapour into the atmosphere pretty much the same as steam, except you can't see it.
Evaporation occurs because the molecules on the surface are moving, colliding, and transferring energy to each other in varying degrees. Sometimes the energy transfer is one sided enough to bring that molecule to the boiling temperature of the solvent, and it evaporates. Moving air over the molecules imparts more energy with more collisions of this type and therefore faster evaporation.
When all the solvent has evaporated this way, the base filler materials and pigments are left hard without any solvent until you soften them again with nail polish remover solvent.
As far as I know, things like nail polish and rubbing alcohol (ethanol) have the alcohol functional group in them (OH), so when they come into contact with other properties that have oxygen in them, they form a covalent (irreversible) bond, which causes evaporation, and hence dryin of the agent.
So in nail polish, when the alcohol evaporates. the rest of the substance changes configuration intramolecularly and hence hardens
In a nutshell...hope this helps...
Arzu has pretty well hit the nail on the head with her answer. (no pun intended)
When things dry, the liquid in them is actually evaporating into the air. So, all the liquid that's on the wet thing has to move into the air. This takes time,. You can speed up this process by blowing on the wet thing. That moves all of the air around the wet thing, which makes it easier for the liquid to evaporate into the air.
You can kind of think of it like if you dropped a tiny bit of salt into a bucket of water. The salt is like the water on your fingernail, and the bucket of water is like the air. If you just leave it there, eventually it will mix all together, and you will not even notice the salt, because it is so little. If you mix the water around, though, the salt will dissolve faster.
Maybe that is not a good analogy, but I hope it still makes sense!
nail polish - evaporation, like everybody said.
but the mechanism is pretty much the same as sweat evaporating from your skin. The sweat will evaporate without wind, but it will evaporate faster with wind -
the sweat or liguid evaporates, but the wind moves the moisture in the air away, so that more sweat can evaporate faster.
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