Archive of the former Yahoo!Groups mailing list: Homebrew PCBs

Xerography is an electrostatic process, yes. I have not kept up with the processes used since the 90s, but it used to be that the toner was essentially very small plastic balls embedded with carbon. The toner was manipulated through the print process by charging the toner one way and the photoreceptor (print drum or organic belt) the other way and bringing them together so that the toner formed an image on the photoreceptor. Then the paper was put in contact with the toner-laden photoreceptor and the toner was transferred from the photoreceptor to the paper by yet another electrostatic operation. Once the toner was released to the paper, the toner image on the paper was fed through some sort of fusing process to permanently (more or less) attach the toner to the paper.

However, we experimented with a completely different process where the toner contained iron as well as carbon and the toner was manipulated partially with electrostatic mechanisms and partly by magnetic mechanisms. I don't remember much about the overall print process. We got it working well enough to demonstrate but not well enough to productize it. IIRC, The original work was done by Kodak in the 80s.

DaveD

 

Pardon Me:

But isn't "xerography" or laser printing essentially an electrostatic process.
It's been a long time since I read about it, so correct me if I am in error.

So,  a ferrous (iron) content would be in the toner?.

Regards,

Roland F. Harriston P.D.
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