Can OEM Epson Cartridges Be Converted for CISS? Key Tips and Considerations

Question:
Is it possible to convert a CISS (Continuous Ink Supply System) with external add-on tanks using OEM Epson empty cartridges? I've also watched some videos where the cartridges are being filled using a syringe, and I am curious if you can connect some tubes to the OEM cartridges for CISS.

Answer:
Now, they can be used for CISS (Continuous Ink Supply System) conversions, and I know that many people do this. However, the question you posed concerns using OEM Epson empty cartridges for a CISS conversion. Original Epson cartridges are a good starting point as they already have a damper built into them, a critical part of the CISS system. However, there are a few key differences to note.
First, all OEM Epson cartridges have an air hole that allows air to fill the cartridge as it gets used. When switching to a CISS system, that air hole must be sealed to ensure that air doesn't enter the ink flow to cause print problems. So, step one: find and plug that air hole.
Second, OEM cartridges have multiple chambers that communicate through tiny holes. When using a CISS system, especially high-viscosity inks (solvent-based and UV), you may need to widen these little holes to let the ink flow properly from the cartridge to your external tanks. If you use dye or pigment inks, you likely will not have to make these changes, but for thicker inks, it is necessary to drill and enlarge the holes.
In addition, sourcing OEM cartridges directly for DTF (Direct to Film) printing on a CISS system can also be impractical. DTF printers usually need a separate setup and specialized cartridges with a unique ink delivery system for the thick density of DTF's DTF inks.
To summarise, the fact is that technically, it is possible to modify OEM Epson cartridges to work correctly with a CISS system if both the air hole is sealed and the internal chambers have been adjusted, especially if the inks used have high viscosity. Do pay meticulous attention to each step because if you modify anything, it could affect the flow of ink or printing quality.

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