Empty Refillable Ink Cartridges - Compatible with WF-7840 WF-7820 WF-7310 EC-C7000 - with Disposable Chip - for Regular or Sublimation Printing - 4 Pack

About this item

• Important: Do not upgrade the printer firmware online (please turn off the printer's automatic upgrade function). Don't worry if the printer can't recognize the ink cartridge. Our ink cartridge chip contains a variety of serial numbers, so you just need to take out the ink cartridge and reinstall it, and make sure to press it firmly into place until you hear a "click".
• Empty ink cartridge set: You will get 4 empty ink cartridges, which we have marked with corresponding colors for easy distinction, and 4 ink injectors, which will allow you to easily fill the ink cartridges.Our ink cartridge has been equipped with disposable chips, which saves you the trouble of buying chips and is very convenient to use.If you need to replace the chip, please search ASIN:B0DJXSFSP5
• Better matching: Our ink cartridge works well with the WF-7840 WF-7820 WF-7310 EC-C7000 printer. Please confirm your printer and ink cartridge type before buying.
• Convenient replenishment: Our sublimation ink cartridge is designed with a white transparent shell, so that you can more clearly observe the ink filling amount and daily ink usage. Using the attached ink replenishment tool can make it easier for you to replenish ink for the ink cartridge.
• When the printer displays the warning message of non-genuine ink, please select "Yes" to use this heavy water. When the printer shows that your ink cartridge is empty, you only need to take it out of the printer, replace it with a new chip, fill it up ink, and then reinstall it. Obstacle removal: The printer is printing, but there is no ink coming out. Problem: The print head has air pockets that prevent the ink from flowing. Refill the ink cartridge, shake the ink cartridge 4-5 times, and then reinstall the ink cartridge into the printer. Push the ink cartridge down hard to ensure that the nozzle of the ink cartridge is well connected with the print head.
• Suggestion: Empty ink cartridges can only contain 90% ink, so as to prevent the ink from overflowing and polluting the printer during use. And be sure to unplug the rubber plug of the ventilation hole during use.If your printer is brand new and you have not used the original ink cartridge, please first install the original ink cartridge and initialize the printer so that your new printer can recognize and use our ink cartridge. If you have any questions about this product, please feel free to contact us.