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What Ink Does the Epson EcoTank ET-3843 Use?
What Ink Does the Epson EcoTank ET-3843 Use?
September 3, 2026 —
Quick answer: the Epson EcoTank ET-3843 uses Epson 502 ink bottles — not cartridges. Four bottles, one per tank, and there is no XL or high-yield version, because the 502 family ships in one size o...
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AirPrint Not Working? How to Fix It on iPhone, iPad, and Mac
AirPrint Not Working? How to Fix It on iPhone, iPad, and Mac
August 7, 2026 —
AirPrint is supposed to be the "it just works" way to print from an iPhone, iPad, or Mac, with no drivers or apps required. So when it suddenly stops working, it's especially frustrating because th...
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Printer Ink Cost Calculator
Printer Ink Cost Calculator
May 9, 2026 —
Printer ink typically costs between 2 and 25 cents per printed page depending on the cartridge, the printer, and how much color you use — and most people are paying significantly more tha...
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What Ink Does the HP OfficeJet 3830 Use?
What Ink Does the HP OfficeJet 3830 Use?
August 21, 2026 —
Quick answer: The HP OfficeJet 3830 uses HP 63 Black and HP 63 Tri-color ink cartridges, or the high-yield HP 63XL versions for a much better cost-per-page.
2026 change: HP has merged HP 63 and HP ...
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What Ink Does the Epson Expression Home XP-410 Use?
What Ink Does the Epson Expression Home XP-410 Use?
October 14, 2026 —
Quick answer: The Epson Expression Home XP-410 Small-in-One uses four separate Epson 200 or high-capacity Epson 200XL cartridges: black, cyan, magenta and yellow. Castle Ink stocks remanufactured 2...
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What Is a Printhead? Where It Is, How It Works, and When to Replace It
What Is a Printhead? Where It Is, How It Works, and When to Replace It
October 16, 2026 —
Quick answer: A printhead is the part of an inkjet printer that actually puts ink on the paper. It's a small chip covered in hundreds to thousands of microscopic nozzles that fire ink droplets as t...
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What Ink Does the Brother MFC-J4335DW Use?
What Ink Does the Brother MFC-J4335DW Use?
August 24, 2026 —
Quick answer: The Brother MFC-J4335DW uses Brother LC406 or LC406XL ink cartridges in black, cyan, magenta and yellow — four individual cartridges. The XL versions roughly double the black and more...
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How Do Inkless Printers Work?
How Do Inkless Printers Work?
August 24, 2026 —
Quick answer: "Inkless" printers still have a consumable — they just move it into the paper. The dominant consumer technology is ZINK, where the color is embedded in the sheet and heat brings it ou...
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What Ink Does the HP ENVY 120 Use?
What Ink Does the HP ENVY 120 Use?
October 15, 2026 —
Quick answer: The HP ENVY 120 e-All-in-One uses two HP 60 cartridges: one black and one tri-color. The high-yield HP 60XL versions fit too. Castle Ink stocks remanufactured 60XL Black, 60XL Tri-col...
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What Ink Does the Epson WorkForce WF-3720 Use?
What Ink Does the Epson WorkForce WF-3720 Use?
May 23, 2026 —
Correction (October 2026): an earlier version of this guide said the WF-3720 uses Epson 220 / 220XL cartridges. It uses Epson 702 / 702XL. Epson 220 fits printers such as the WF-2630, WF-2650 and X...
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October 16, 2026 — Quick answer: A printhead is the part of an inkjet printer that actually puts ink on the paper. It's a small chip covered in hundreds to thousands of microscopic nozzles that fire ink droplets as t...
May 23, 2026 — Correction (October 2026): an earlier version of this guide said the WF-3720 uses Epson 220 / 220XL cartridges. It uses Epson 702 / 702XL. Epson 220 fits printers such as the WF-2630, WF-2650 and X...
