MadSci Network: Engineering

Re: Why does a pen explode?

Date: Mon Jun 2 19:35:10 2003
Posted By: Gary Treistman, Undergraduate, Gen. Knowl. Dept., Programming Technologies
Area of science: Engineering
ID: 1052432088.Eg

The pen "explodes" because there is a build up of pressure of the fluid in the ink cartridge. This is usually due to heat expanding the ink (as if it were in a hot environment too long, even pants' pockets), but can also be due to barometric pressure in the atmosphere lowering. Another reason may be simply mechanical stress on the cartridge.

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