We take cryptocurrency — so the coins you hold can buy real hardware.Pay in crypto, spend it on real hardware. Free insured shipping worldwide over $399. Plain, unbranded boxes, sent from Germany.Free insured shipping over $399. Your rate is locked for 30 minutes once checkout opens.Rate locked 30 minutes. Every item sealed, serial-checked and covered by a 24-month warranty.Sealed, 24-month warranty.

Saved items Sign in
Rectangular cyan ink cartridge with a matte black body and a blue label, 250 ml capacity

Summit Postal Products

Summit Postal Products CJ-21 Cyan Ink Cartridge 250 ml

SKU CH-E2XP-JDV65

A 250 ml cyan dye-based ink cartridge for Formax ColorMax7 and ColorMax8 envelope printers, replacing the CJ-21

  • Cartridge QuantitySingle Pack
  • Cartridge ColorCyan
  • 250 ml capacity keeps high-volume envelope jobs running longer
  • 100 % Formax-compliant cyan dye ink produces vibrant, professional colour output
  • Plug-and-play design fits ColorMax 7 and ColorMax 8 printers without adjustments
  • Replaces Formax CJ-21 cartridge for direct, hassle-free substitution
  • Remanufactured in the USA with consistent reliability for mailing operations

Compatible Cyan Ink for ColorMax Envelope Printers

This Summit Postal Products cartridge replaces the Formax CJ-21 Cyan for ColorMax7 and ColorMax8 envelope printers. It contains 250 ml of 100% Formax compliant cyan dye-based ink. The aftermarket cartridge delivers vibrant colors and professional print quality for mailing operations. Plug and play compatibility allows straightforward installation without additional setup.

Consistent Output Across Extended Print Runs

The 250 ml ink volume supports sustained envelope printing without frequent cartridge changes. Dye-based formulation maintains color density and vibrancy throughout long jobs. Plug and play design ensures the printer recognises the cartridge immediately, reducing downtime during high-volume sessions. Reliability is built for continuous operation in mailing environments.

250 ml Capacity Determines Job Duration

The single cartridge holds 250 ml of cyan ink, which directly sets how many envelopes can be printed before replacement. Users with higher volume requirements will need multiple cartridges or more frequent changes. This capacity suits standard mailing workflows but not uninterrupted bulk production. Buyers who need larger ink reservoirs should consider alternative supply configurations.

Highlights

  • 250 ml capacity keeps high-volume envelope jobs running longer
  • 100 % Formax-compliant cyan dye ink produces vibrant, professional colour output
  • Plug-and-play design fits ColorMax 7 and ColorMax 8 printers without adjustments
  • Replaces Formax CJ-21 cartridge for direct, hassle-free substitution
  • Remanufactured in the USA with consistent reliability for mailing operations

Specifications

Cartridge QuantitySingle Pack
Cartridge ColorCyan

Questions about this item

Does the 250 ml cartridge generate noticeable heat or noise during continuous envelope printing?

The ink cartridge itself has no moving parts and produces no noise or heat; any sound or warmth comes from the printer engine, not from the cartridge.

Which printer models must I already own for this CJ-21 cyan cartridge to work?

It is a direct replacement for the Formax CJ-21 and fits Formax ColorMax7 and ColorMax8 envelope printers only.

Will this cartridge function correctly if I keep an older Formax CJ-21 cyan cartridge installed in another slot?

Each slot takes one cartridge; the new CJ-21 cyan works independently alongside any remaining original cartridges in the ColorMax7 or ColorMax8.

Also in this aisle

People compared these

Same shelf, same checkout — eight coins and a 30-minute rate lock.