HP Scitex

Matching the right UV ink to your Scitex flatbed

Two ink lines cover the Scitex flatbed range above, and the choice is decided by your machine, not by preference:

• FB250-compatible ink is for the HP Scitex FB500 and FB700 series, in six colours: black, cyan, magenta, yellow, light cyan and light magenta.
• FB794-compatible ink is for the HP Scitex FB550 and FB750, covering those six colours plus a seventh channel, white.

These are not interchangeable between machine families. Each product page states the printers, the volume and the cross-referenced part number for that colour, so you can match against the bag currently loaded before ordering. If your machine has been through a mid-life upgrade and you are unsure which family it now belongs to, ask us before you buy.

Why white behaves differently to every other channel

If you run an FB550 or FB750 with the white channel, it deserves separate thought. White UV ink is dense and pigment-heavy, and it settles. That has consequences no other colour has:

• White needs circulation and agitation. A white channel left standing will separate, and the first sign is usually poor opacity rather than outright failure.
• White is the channel most likely to cause recirculation and line problems, which is why it is most often implicated in flatbed service calls.
• Shops that run white intermittently have more trouble than shops that run it constantly. If white is occasional work for you, plan maintenance around that, not around your colour cycle.

Our white ink circulation guide covers the mechanics in detail; the principles carry across from DTF to UV flatbed work.

Bag-in-box, and why the format matters

These inks are supplied in high-capacity bag-in-box format rather than small cartridges. For a flatbed running daily that is the point: fewer changeovers, less handling, less opportunity for contamination each time a channel is opened. It also changes how to think about stock - you hold fewer, larger units, so running out hits a production schedule harder than it would on a roll-to-roll machine.

UV flatbed work and what it demands of ink

Rigid signage, point-of-purchase displays, direct-to-board printing, short-run packaging and industrial marking all sit on these machines. The common factor is that the substrate varies constantly - foam board one day, acrylic the next, corrugated after that - and adhesion behaves differently on each. If you are moving onto a substrate you have not printed before, test adhesion and cure on an offcut before committing a client job to it. That is true of any UV ink, OEM included.

Storage and handling

Keep boxes sealed until use, store out of direct sunlight at normal indoor room temperature, and rotate stock so the oldest goes in first. UV ink is light-sensitive by design - it is formulated to cure under UV energy - so leaving an opened bag exposed is asking for trouble. Bring anything stored cold up to room temperature before loading.

About these aftermarket inks

Every ink in this catalogue is an aftermarket consumable. It is not manufactured by, affiliated with, endorsed by or authorised by the printer's manufacturer. Manufacturer names, model numbers and cartridge part numbers appear here for one reason only: to identify which machines a product is designed to work with.

We say that plainly because the alternative causes real problems. A shop that believes it is buying an OEM product and then has a warranty conversation with its manufacturer is a shop we have failed. If your printer is under a manufacturer warranty or a third-party service contract, check the terms before switching consumables - some agreements restrict which inks you may run.

What we will tell you is what a product is compatible with, in writing, before you order. If your exact configuration is not listed, ask us rather than guessing.

When the ink is not the problem

A large share of the "bad ink" calls we take turn out to be mechanical or maintenance faults that no ink can fix. Before changing consumables to chase a print-quality problem, rule out the usual causes:

• Banding that repeats at a fixed interval is usually a feed, encoder or head-height issue rather than an ink issue.
• Dropouts and missing nozzles after a machine has stood idle point at the capping and wiper system.
• Colour drift across a roll is often a profiling or environment problem - temperature and humidity move colour more than most operators expect.
• Repeat clogging in one channel is a damper, line or head symptom, and swapping ink brands will not resolve it.

Our diagnostic references cover these in detail: the eco-solvent banding troubleshooting guide, the capping station maintenance guide, and the printhead replacement decisions guide, which covers when a head is genuinely worth replacing and when it is not.

If you would rather have someone look at it, we provide independent on-site wide-format printer repair across Florida. Our service network typically replies within 1 hour during business hours.