Remanufactured for HP 831 Latex Optimizer 775ml Ink Cartridge (CZ706A) | Castle Ink

Keep your HP Latex 310, 330, 360, 370 and 570 printer running for less with the Castle Ink remanufactured HP 831 Latex Optimizer 775ml (CZ706A). Each cartridge starts life as a genuine HP 831 775ml cartridge, which is cleaned, inspected, refilled with fluid matched to the original, and tested in the USA, so it installs and performs just like the OEM part at a lower price per milliliter.

The Latex Optimizer is a pre-treatment fluid your HP Latex printer jets ahead of the colored inks. It immobilizes the ink pigments on the substrate so images stay sharp and dense at high print speeds, and it is required for the printer to run, even though it adds no color of its own.

At a Glance

• Replaces: HP 831 Latex Optimizer 775ml (CZ706A)
• Color: Latex Optimizer (clear)
• Capacity: 775 ml (same fill as the OEM cartridge)
• Ink system: HP 831 latex ink system
• Type: U.S. remanufactured from a genuine HP shell
• SKU: 11359H

Why Choose Castle Ink Remanufactured?

• Genuine HP shell and chip: built from original HP 831 cartridges, so fit and printer communication match the OEM part.
• Remanufactured in the USA: every cartridge is cleaned, refilled and quality-tested before it ships.
• Full OEM fill: 775 ml, the same volume as the HP original.
• Lower cost per print: a smart way to cut consumable costs on high-volume sign and graphics work.
• Greener choice: reusing cartridge shells keeps them out of landfills.
• Satisfaction guaranteed and backed by Castle Ink's customer support.

Compatible Printers

• HP Latex 310 54-in
• HP Latex 330 64-in
• HP Latex 360 64-in
• HP Latex 370 64-in
• HP Latex 570 64-in

Complete your set with our remanufactured HP 831 latex inks: Black (CZ682A), Cyan (CZ683A), Magenta (CZ684A), Yellow (CZ685A), Light Cyan (CZ686A) and Light Magenta (CZ687A).

Not sure this is the right cartridge? Check the part number on your current cartridge (CZ706A) or the ink status screen on your printer, or contact us and we'll confirm the fit.

Frequently Asked Questions

Will my printer show a message when I install it?
Because this is a refilled genuine HP cartridge, your printer may display a "used" or "refilled cartridge" notice. Simply acknowledge it and keep printing; print quality is not affected.

Can I mix this with genuine HP cartridges?
Yes. You can run it alongside your existing HP 831 ink cartridges.

When will it ship?
Orders placed by 4 PM ET, Monday through Friday, ship the same business day.