Toner Yield

[Caffeine]

Another toner related question for those who may know the answer...

Modern toners like the EA-HG or EA-Eco used in most of Xerox's current lineup last MUCH longer than older toner, such as in the DC5000/DC7000/DC8000 machines. Given the exact same weight of toner, the newer prints nearly twice as many prints.

As I understand it, this is largely (if not almost entirely) due to the smaller particle size of modern toners.

My question is, if you used a newer toner in an older machine (for example, I have heard many examples of people using EA-HG toner from the 250-series in a DC5000) will you get the same or similar yield in the DC5000 as you would have gotten in the DC250, or will the DC5000 'burn through' the toner as the same speed that it would have used its OWN toner?

Does the toner itself create the improved yield, or are there mechanical differences in the machine (laser power output, developer doctor bar gap, etc etc) which, combined with the newer toner, provide the longer yield?

Thanks as always for the discussion!

[Scarecrow]

Re: Toner Yield

Caffiene, I would guess that toner yield, per pound, is a direct result of transfer efficiency in properly toned machines that don't reuse "waste" toner. To achieve that proper copy quality, the toner "pile" on the drum or belt would have to be higher on lower yield machines because a higher percentage of that pile is left to be cleaned off. How to use more of that pile, and thus decrease the amount of waste, that also increases yield, is something I would like to know. Particle size may be part of the xerographics involved, but I suspect there may be more to it.