Original HP Laserjet printer, free in Maryland...

[Fred Cisin]

> >  I worked on the Canon CX and SX engines for a living for a few years.
> > I remember pretty clearly that the PC-1 copier cartridges are
> > physically identical, but they don't work.  The composition of either
> > the drum coating or the toner is different.

On Wed, 8 Dec 2010, Alexandre Souza - Listas wrote:
>     Strange, they use even the same engine, why woulnd't work? ;oO

Not quite.
I do not know the specific differences, but, I do know that if you put CX
toner in a PC10 copier cartridge, you get a white on black image, but not
a clean one - it vaguely resembles solarized photos.

CX also makes vaguely round dots "inscribed" in a rectangular grid, that
do not overlap [much].  You can not get a really good black.


On the SX, which is a engine that is much different from the CX and PC
ones, the dots are larger, and overlap, so you can get a much richer
black.