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What can I do with empty laser toner cartridges?

Surely there's something cool that can be done with these... I haven't taken one apart yet- but I will. 
Anyone have ideas?

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there is ,in almost all toner cartridges, a long bar magnet wich is pretty powerfull but that is pretty much all there is to get in toner cartridges.
there is also a big metal tube wich is next to this magnetic bar
orksecurity6 years ago
Before you sacrifice them, be aware that some stores will take them for recycling, issuing you a store credit. Usually not a lot, but it helps keep cost of operation down.
Staples issues a store credit. Its not much, but its something.
Depending on the kind of toner inside, you might be able to make some ferro-fluid (Magnetic liquid)

http://en.wikipedia.org/wiki/Ferro_fluid
lemonie6 years ago

They can be recycled. (ork)

L
rickharris6 years ago
DON'T open it unless you want to spread carbon dust all over your house!!!

in addition it isn't considered good for your health.

Recycle.