Random Thought #49 - Where Does It Go?

 

This might be just me being dumb.

Or maybe it's a phenomena that only occurs in my house (because my mum says she has noticed this too).

But when you have a fountain pen, if you don't use it for a while, the ink in it disappears.

Even if you put a brand new cartridge in it and use it briefly, weeks or months down the line you will come back to use it and the cartridge will be empty.

So where does the ink go?