I'm a photocopier / printer tech from way back.  About 15 years.  I have 
worked on most high end brands in excess of 100 to 140 pages per 
minute.  The ones you say, I would exclude (B...) as I have found them 
to be not easily repaired.  If you can stay away from (X...), only 
because you will have to deal only with them, parts are expensive as 
well.  The best advice I can offer is to look at (K... ) there costs are 
low, image quality exceptional and they rarely breakdown.  I had one 
customer who's factory (huge in size, outlets Australia wide) had 
something like 200+ high end (K...) mix of digital black and colour as 
well as their printers.  One machine I am thinking of, did just short of 
900,000 on one maintenance kit.  By this time the prints were still in 
good shape.  The maintenance kit was installed as a preventative 
maintenance measure.  And that's a point too, the maintenance kits, 
change everything, needed in the machines about every 300,000.  So what 
I'm saying is they are worth a look into. Tone cost are also very low.
I'm am not in that industry any more as my day job.  But when I was we 
had an application program that could tell you the page coverage.  So 
customers could be shown on their own printing/copying what the real 
world %... coverage was.  I had a look but can't seem to locate the 
application.  It worked on both black and colour.
http://global.kyocera.com/
http://www.kyocera.com.au/copiers.asp

Well that's my %5 percents worth anyway. :-)

Peter


Gerhard Fiedler wrote:

>William ChopsWestfield wrote:
>
>  
>
>>On Mar 30, 2006, at 3:19 AM, Russell McMahon wrote:
>>
>>    
>>
>>>My question is, does anyone have *real world* figures for typical
>>>percentage cover of typical printed pages. This is obviously highly
>>>variable with application, but the very commonly quoted 5% figures
>>>seems to be low.
>>>      
>>>
>
>  
>
>>However, all the cartridges are claiming to have a historical
>>coverage of right around 5%.  
>>    
>>
>
>I printed a plain text document (reasonably full page) to a printer driver
>with image writer function (FinePrint) and looked at the result with Paint
>Shop Pro's histogram function. About 3.5% black pixels. 
>
>I can easily repeat this, if you want to send me a few sample pages (e.g.
>some PDFs).
>
>Gerhard
>
>  
>
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