On Sun, 29 Jul 2001 19:31:58 -0600, William Robb wrote:
> Today at dog school, I had to refill the
> photocopier toner cartridge, and the toner was a
> very fine black powder that got all over
> everything (it was quite funny, fortunately my
> dog is already black).
> Would this be carbon black (lamp black)?
It might have been, but I strongly doubt it. The toner has to be
heat/pressure fusible into something that's still solid and black (on a
B&W copier, which I'm assuming you're talking about). When carbon black
is fused, I'd expect it to turn into mostly CO and CO2, neither of
which is either solid or black (at room temperature).
I'm no expert on toner or xerography, but I understand that some toners
are actually clumps ... a central "ball" that adheres to the charge
deposited on the paper, but "goes away" during fusing, that's
electrostatically attached to a halo of smaller "balls" that are the
actual pigment agents that are fused into the paper.
TTYL, DougF
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