Epson 7890 internal cleaner

fineartphil

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There are a number of internal cleaning solutions on the market on can fill into empty ink cartridges to clean Epson k3 /Ultrachrome inks. Most of these solutions are priced in the stratosphere commanding $200 dollars or more per gallon. I am hoping someone knows the formula for making their own solution that is both safe and effective internally inside the Epson pro machines.
 

The Hat

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Larryb

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I hear that rubbing alcohol has oils mixed in. For this reason I would stay away from rubbing alcohol.
 

fineartphil

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I am finding a lot of food grade propylene glycol online, is this workable or is there another grade or type I should use???
 

pharmacist

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Hi fineartphil,

that is the right grade of propylene glycol. You don't want to use the toxic ethylene glycol.

However, the formula for the conditioning/cleaning solution is a bit different from the preservation solution:

conditioning/cleaning:

3 % propylene glycol
20 % isopropyl alcohol (IPA), 99% should be OK if the 1% is just normal water and not some additive.
distilled water up to 100 %

For extra cleaning power (dried ink and pigment particles): ad 20-25 drops (equals about 1 ml) of concentrated ammonia to each 100 ml of conditioning/cleaning solution.

The preservation solution (for storing print heads) has a increased amount of propylene glycol (explained in the link given by The Hat):

20 % propylene glycol
20 % isopropyl alcohol (IPA)
distilled water up to 100 %
 

fineartphil

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I cannot thank you enough, much gratitude my friend. Hopefully I can resurrect my 7890, it shows different clogged nozzles each time I run a nozzle check. I also misquoted the cost of cleaning solutions online, at last check a gallon tipped the scales at $500. Quite incredible as it is in line with the mega bucks Epson repair/ services.
 

Paul W.

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For extra cleaning power (dried ink and pigment particles): ad 20-25 drops (equals about 1 ml) of concentrated ammonia to each 100 ml of conditioning/cleaning solution.

Can you help me understand what is meant by "concentrated ammonia"? And where would I get that? I see you are in Belgium - I think these concentrations are different in Europe and the US.

Thank you!
 
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