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What Ink Does the Epson WF-7840 Use?
What Ink Does the Epson WF-7840 Use?
September 23, 2026 —
Quick answer: The Epson WorkForce Pro WF-7840 uses four individual Epson 812 DURABrite Ultra pigment cartridges: Black, Cyan, Magenta and Yellow. The high-capacity Epson 812XL cartridges fit the sa...
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Epson Maintenance Box: Where It Is, When to Replace It, and Which One You Need (T04D1, C9345, C9344)
Epson Maintenance Box: Where It Is, When to Replace It, and Which One You Need (T04D1, C9345, C9344)
September 27, 2026 —
Published September 27, 2026. Written by William Elward, founder of Castle Ink.
Quick answer
An Epson maintenance box is a replaceable waste-ink container. It collects the ink the printer flushes d...
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Find Ink by Printer
Find Ink by Printer
May 21, 2026 —
Castle Ink Cartridge Finder
Find the exact ink or toner cartridge for your printer in seconds, organized by brand and series below.
HP Ink Canon Ink Brother Ink Epson Ink Toner & Drum Guides...
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