OKGO!INK 522 Ink Refill Bottles — 600ml Set (3×100ml Black, C/M/Y) High-Yield Compatible with Epson ET-2800

These refill bottles are a drop-in solution for Epson models that accept 522-series ink, offering bulk capacity in three black and one-each cyan, magenta, and yellow bottles. The set is formulated for general document and photo printing (not for sublimation) and is produced in ISO-certified facilities to meet common quality and environmental standards. You get more prints per milliliter than standard cartridges by refilling your EcoTank reservoirs directly.

How much ink comes in the pack and what yields can I expect?

This six-bottle kit contains a total of 600ml: three 100ml black bottles plus one 100ml bottle each of cyan, magenta and yellow. Yield estimates are based on 5% A4 coverage: each 100ml black bottle can produce roughly 6,000 pages, and each 100ml color bottle about 8,000 pages.

• Total volume: 600ml (3 black, 1 cyan, 1 magenta, 1 yellow).
• Estimated black yield: ~18,000 pages (three black bottles combined at 5% coverage).
• Estimated color yield: ~8,000 pages per color bottle at 5% coverage.

Which Epson printers will work with these 522 replacement bottles?

These bottles are made to replace Epson 522-series ink and are compatible with a range of Epson EcoTank and refillable models. Before purchasing, check your printer’s manual or the ink door to confirm it lists 522 or T522 as the compatible ink type.

• Compatible examples: ET-2800, ET-4800, ET-2720, ET-2803, ET-2400, ET-4700, ET-4810, ET-2840.
• Not suitable for printers that use different cartridge families or non-refillable systems.
• Designed for direct-tank refilling—no cartridge conversion required.

Are these inks safe and what quality standards are followed?

OKGO!INK manufactures these refill bottles in facilities audited for common quality and environmental management systems, and the liquids are intended for standard printing workflows. They are not sublimation inks and should be used only in printers that accept dye or pigment-based refill inks as directed.

• Produced in factories meeting ISO 9001 and ISO 14001 standards.
• RoHS-compliant manufacturing processes reduce hazardous substances.
• Packaged for direct refill—follow printer instructions to avoid spills.

Who is this for: This 600ml OKGO!INK 522 refill set is aimed at home offices, small businesses, teachers, students, and anyone who prints frequently and prefers the lower cost-per-page of refillable EcoTank-style printers. If you own an Epson model that lists 522/T522 compatibility and you want a larger supply of replacement ink without cartridge swaps, this pack provides an economical, ISO-factory-produced option. Avoid use in devices that require OEM-only inks or in applications calling for sublimation transfers.