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Message 1564287 - Posted: 29 Aug 2014, 9:59:44 UTC

Simple answer. The embedded chip on the cartridges. Thought with your experience, you would have known that.
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Message 1564289 - Posted: 29 Aug 2014, 10:04:49 UTC - in response to Message 1564284.  
Last modified: 29 Aug 2014, 10:42:21 UTC

 
You can put the Black No.15 in both printers and it will work.

Black No.45 will not work in HP 840C (just because it was cheap printer and HP want to 'reclaim' money by forcing people to buy Black No.15)

This is intentional: 15 contains less ink from the factory (but if you refill it you can put the same amount of ink (42 ml) in it as in #45)
No technical reason - 15 and 45 are the same electrically and both have 300 nozzles.
But there is check in the firmware of 'cheap printers' to intentionally not accept 'full' cartridges (like 45 and 23/41)

If you refill #17 it will 'accept' ~3*15 ml (the factory is only 3*5 ml)
(Note: there are some new modifications of 'half-empty' cartridges (like #17) that contain half sponge (from the bottom to the half-height of cartridges) - they will not 'accept' more than ~3*10 ml)

Colour No.17 have 64 nozzles per colour (total 3*64) but Colour No.78 have 128 nozzles per colour so they are not interchangeable in any direction

(Colour No.17 can be used instead of Colour No.23)


EDIT:
Note about 'ink level' shown in Software - it is calculated, NOT measured

Calculation is based on the serial number of the cartridge.
Printer will remember (in Printer's flash memory) 2 serial numbers for Black and 2 serial numbers for Colour cartridges.

While you print the 'number of drops' (billions) remaining (for this serial number) will be decreased.
HP Printers have only warning if they think 'ink level is low' but there is no 'protection' so you can continue to print with (refilled) cartridge even if the printer show it is 'empty'

The above shows:
- When you put the Black No.15 in the other printer it will show as completely full (even if it is empty) - the printer do not know this serial number
- If you print on 'the other printer' and consume e.g. 1/3 of the 'ink level' - when you return the cartridge in the first printer it will show the same 'ink level' as it was before you removed it
- To make printers 'forget' 'ink levels' (just as experiment) - get some old empty cartridges - put 2 Black and 2 Colour (one after another of course)
then put the 'original' Black + Colour back - and the printer will show them 'full of ink' ;)
 
 


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Message 1564323 - Posted: 29 Aug 2014, 11:27:07 UTC

My Canon printer refuses all refilled cartridges, while the HP printer accepts them.
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Message 1564345 - Posted: 29 Aug 2014, 12:59:41 UTC - in response to Message 1564323.  

My Canon printer refuses all refilled cartridges, while the HP printer accepts them.
Tullio


I use cheap cartridges for my Canon IP 4850.
I pay €3.50 each.
Chip is included.


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Message 1564356 - Posted: 29 Aug 2014, 13:26:10 UTC
Last modified: 29 Aug 2014, 13:26:27 UTC

Actually working for one of the large printer manufactures I can tell you there are a lot of shenanigans going on with ink/toner.
The IC they put in the cartridge is used to limit how much of the stuff in side is actually used. In some cases people are throwing away cartridges that still contain 50% of their contents.
Sometimes the IC will also limit which printer the cartridge can go in or give you reduced usage of the cartridge.

It is much like gaming consoles. The devices are sold at near cost, or sometimes a loss, and it is expected to make up for it in consumables.

Also something many don't realize is that the consumables that ship with the unit are generally much smaller than the replacements you buy. The toner cartridges that ship with our units, starters, are normally 1500-2000 pages. Then the replacements come in values from 5000 to 18000 depending on the printer.
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Message 1564377 - Posted: 29 Aug 2014, 14:16:15 UTC - in response to Message 1564323.  

My Canon printer refuses all refilled cartridges, while the HP printer accepts them.
Tullio

By "refilled cartridges" I hope you mean original Canon cartridges refilled by you (and not some china-made replacements)

Old Canon (>8 years old) have no any protection.

New Canon (I don't know about the last 2 years) usually only need:
- while the printer is ON: press and hold 'Cancel' button for 10-20 sec
('Cancel' is usually pink circle with triangle in it)

If the printer have more buttons - sometimes you need to use [OK] button the same way

(only for some (like Canon MP520) more 'button pressing' is needed)


These 'secret keys' are probably added so the 'authorized personnel' can test the printer without need to put new cartridges.
(the same way 'cheat codes' in games are put there so the game developers can easily test/debug the game)
 


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Message 1564404 - Posted: 29 Aug 2014, 15:06:11 UTC - in response to Message 1564377.  

My Canon printer is a PIXMA MX395. If I buy refilled cartridges from my local dealer, they won't print. I went back to him and he explained I had to go to a procedure like you outlined. OK, I told him, give me original Canon cartridges and I shall pay the difference. So we agreed. Instead the HP ENVY 4500 accepts refilled cartridges.
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Message 1564464 - Posted: 29 Aug 2014, 16:43:49 UTC - in response to Message 1564321.  

Yep, Use an HP 7280 all-in-one for day to day printing (Costo refills), and use an Epson R3000 for printing photographs (OEM Ink).

Brett
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Message boards : Number crunching : HP printer cartridges


 
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