ISO 24711 - Standard my a*se!

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I've had a comparison spreadsheet which I've used for a while now to calculate just how much ink, cost, etc.. there is and use it to help figure out pricing and the like.

Now allegedly the new ISO 24711 allows a simpler means of comparing inkjet cartridge capacity and output based around a detailed specification. So, where things get hazy is how on earth have HP managed to completely obfuscate the information and come out with capacities that differ hugely from everyone else.

What do I mean? Well here you go...

Take the Epson B500-DN

Extra-High capacity ink cartridge black Black: 8,000 pages*
High capacity ink cartridge (Black, Cyan, Magenta, Yellow) Black: 4,000 pages*, CMY 7,000 pages*
Standard capacity ink cartridge (Black, Cyan, Magenta, Yellow) Black: 3,000 pages*, CMY 3,500 pages*

Then take a look at the HP K5400

Black XL Page yield (black and white) 2,450 pages*
Yellow XL Page yield (colour) 1,540 pages*
Magenta XL Page yield (colour): 1,980 pages*
Cyan XL Page yield (colour) 1,700 pages*

How in the world can everyone else give capacities that are the same across the board for each colour and yet the HP cartridges manage to pull this cr*p where they have different outputs.


So, at the end of the day I have to think that this idea of a standard is just a joke.. If you can't use it to compare between printer brands it's a complete waste of time. If anyone from ISO is reading this.. FFS: Sort it out!


*and end rant*

 

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How in the world can everyone else give capacities that are the same across the board for each colour and yet the HP cartridges manage to pull this cr*p where they have different outputs.

Actually I may, inadvertently have figured this out.

Does anyone know if the HP printers (or any other for that matter) have tweaked outputs for different colours..

ie: Is there less use of the Magenta compared to the Yellow & Cyan?

 

[Grandad35]

Websnail,

It is impossible to predict how much of each ink color will be used on average because it depends so much on what you are printing. For example, I started to process my photos a little on the darker side about a year ago because I like the effect and also to improve the fade resistance. I noticed that my ink consumption went up by over 20% when I made the change. If you like "high key" photos, your ink usage will be far lower than if you print normally.

In any event, here are the percent usage of the 8 inks on my i9900 over the past 3 years:
PM 28
M 9
PC 20
C 6
Y 18
K 8
R 6
G 5

Note that these values also include the ink used for cleaning cycles, not just for printing.

From previous tests, we know that PM and PC are about 1/7 the strength of M and C, so you can try to adjust the total M and C usage by this factor, if you wish.

In any event, it is clear that the usage rates for each color are quite different.

 

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In any event, it is clear that the usage rates for each color are quite different.

In which case it would seem I did HP an injustice and it's Epson, etc... that are playing fast and loose... which on reflection makes a bit more sense.

Hardly seems worth bothering with a standard if that's the case eh?