crosskid
newbie
Reged: 01/03/2008
Posts: 10
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Your informative article "How Printing Works" was most interesting and generally well researched and I found it very intriguing. However you repeat a line that I have read elsewhere without (as elsewhere) explaining why ie Dyes versus Pigment inks where you state that the correct type of ink must be used with the printer.
With a printer for dye based inks it is common sense that all those microscopic particles will clog the nozzles fairly quickly.
However it does not seem sensible the other way, since a solution is less likely to clog nozzles made for pigment inks. pigment inks which are an emulsion.
Logically dye based inks should run very well on a printer designed for pigment inks. They don't as I know from actual practice but I can't understand why, do you? 
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Old Git still trying to cut it
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IanBurley
newbie
Reged: 03/03/2008
Posts: 1
Loc: Hemel Hempstead UK
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Quote:
Your informative article "How Printing Works" was most interesting and generally well researched and I found it very intriguing. However you repeat a line that I have read elsewhere without (as elsewhere) explaining why ie Dyes versus Pigment inks where you state that the correct type of ink must be used with the printer.
With a printer for dye based inks it is common sense that all those microscopic particles will clog the nozzles fairly quickly.
However it does not seem sensible the other way, since a solution is less likely to clog nozzles made for pigment inks. pigment inks which are an emulsion.
Logically dye based inks should run very well on a printer designed for pigment inks. They don't as I know from actual practice but I can't understand why, do you?
Hi, I'm pleased someone liked my article. 
The print head channels, chambers and firing mechanisms are designed to accommodate the specific fluid attributes of ink correctly formulated for that printer. This attention to detail is required to ensure that the ink droplets ejected from each nozzle are the correct size/volume and that there are no mis-fires.
The fluid characteristics, including viscosity, surface tension, etc., are more than likely to be significantly different between a dye-based in and a pigmented ink. In fact, these factors will even vary between dye-bsed inks from different manufacturers for different dye-based printers.
Petrol (gasoline) is less viscous than diesel, but you wouldn't want to to put petrol in your diesl tank...
Ian
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What Digital Camera contributor
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Lounge Lizard
Old Wrinkly
Reged: 17/01/2004
Posts: 17885
Loc: Cambridge, Cambridgeshire
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As I suggested in replying to your other thread on the same subject, your reasoning is plausible to a degree but you have failed to take into account other important design issues. I can assure you that printer manufacturers invest a lot of time and money into research to deliver a product that is reliable and technically advanced and the design of inks and print heads is far from as simplistic as you make out.
So, if you have put dyes into your pigment ink printer and find that it no longer works, you might have also discovered that the two ink types may not even mix and interact giving a fluid of even different characteristics if you did not flush out the entire system beforehand. Perhaps a knowledge of the chemistry of the ink types might help as well.
I somehow suspect that you seem to be blaming the manufacturers for your misuse of their product. I've no idea what your objectives and motivations were in doing this but if you were advised to do this by a supplier, I would suggest that you complain to the supplier rather than doubt the technology itself.
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Lounge Lizard
Success is the ability to go from one failure to another with no loss of enthusiasm.
Winston Churchill
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TheFatControlleR
L'éminence Grise, Devil's Advocate & AP Fanboy!
Reged: 24/04/2001
Posts: 10787
Loc: In A Glass Darkly
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Can we keep this in one thread. Thanks...
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