Corrugated printers run water-based ink through some of the fastest single-pass printheads in the packaging industry, and the ink filter sitting between your pump and the head is the last line of defense before ink reaches the nozzle plate. Many maintenance teams already know the 5 micron vs 10 micron debate from ceramic tile printing. Water-based corrugated ink, however, behaves differently inside a filter, so copying a ceramic line’s filtration setup does not always work. This guide explains how water-based ink changes the picture and how to decide between a 5 and 10 micron filter on a corrugated line.
Why Water-Based Corrugated Ink Puts Different Demands on a Filter
On a single-pass corrugated printer such as the KINGTAU SCB1600, ink is continuously circulated from the main tank through the supply system to the printhead and back. Any particle that survives the filter ends up in a nozzle channel that is only a fraction of a hair wide. A single oversized pigment agglomerate or a flake of dried ink skin can deflect a jet, and on a one-pass line there is no second chance to reprint the same board.
Water-based ink adds its own challenges. Water evaporates faster than solvent-based ceramic ink at the meniscus, so ink skins form on wetted surfaces when a machine idles. Pigments also tend to settle when circulation stops over a weekend. The filter therefore has two jobs at once: catching particles during production and becoming the place where settled material accumulates when the line is down.
How Water-Based Ink Differs From Ceramic Ink Inside the Filter
Pigment and binder load
Ceramic glaze inks are solvent-carried pigment suspensions engineered for high-temperature firing, while corrugated water-based inks carry pigment together with binders and additives that must dry onto porous paper or linerboard. The binder fraction in water-based ink can build a soft, sticky layer inside the filter element over time. This means flow restriction on a corrugated printer is often caused by a gradual buildup of binder and skin rather than a single hard particle, which is why pressure behavior over days matters more than one snapshot reading.
Foam, air and evaporation
Water-based systems foam more readily when ink is agitated, and entrained air changes how ink passes through a filter element. Small bubbles can mimic the pressure signature of a clogged filter. Before you replace an element based on pressure alone, rule out air in the circuit first, because the remedy is purging rather than a new filter.
5 Micron or 10 Micron: Which Rating Fits a Corrugated Line?
The right rating depends on the filtration position in the circuit, the pump’s pressure margin, and what the printer manufacturer specifies. The exact factory micron rating for each KINGTAU model is not published on our site, so treat the following as general guidance and confirm your machine’s specification before switching ratings.
Where a 10 micron filter fits
A 10 micron element is the common choice as a mainline or tank filter. It carries a lower pressure drop, so the circulating pump works against less restriction, and it tolerates the binder-rich load of water-based ink for longer before delta pressure climbs. If your nozzles are healthy but the pump sounds strained or flow looks weak, a heavily loaded 10 micron element is often the culprit.
Where a 5 micron filter fits
A 5 micron element is typically used as a final filter close to the printhead, where its tighter rating protects the nozzle channels from the particles that matter most. The trade-off is a higher pressure drop and faster loading. Running a 5 micron element where the system expects 10, especially as a mainline filter, can starve the head during long production runs. Our ceramic-side article on Kerajet ink filters, 5 micron vs 10 micron, covers the same trade-off from the solvent ink perspective and explains why swapping ratings is not always a straight upgrade.
Symptoms of a Restrictive or Clogged Ink Filter
- Missing or deflected nozzles that return after purging, then disappear again during the run. This pattern usually means particles are reaching the head intermittently, pointing to an overloaded or wrongly rated filter.
- Slower priming after a filter change. If the system takes noticeably longer to fill than it did last month, the new element may have loaded quickly, a sign the upstream filtration stage is not catching what it should.
- Falling circulation flow with no air fault present. Once you have ruled out cavitation and air ingress, progressive flow loss almost always points to filter restriction.
- Visible residue at the filter housing during service. Note the color and texture. Soft, sticky residue suggests binder and skin buildup; gritty residue suggests pigment agglomerates or debris from a worn component upstream.
How Often Should You Change Filters on Water-Based Ink?
There is no universal interval, because it depends on run hours, ink throughput and how often the machine sits idle. What matters is treating filters as consumables with a recorded replacement history. Note the date, run hours and condition of every element you pull, and replace on a schedule informed by that record rather than waiting for nozzle faults. If your line runs mixed shifts with frequent stops, expect shorter filter life than a plant with long continuous runs, because idle periods accelerate skin formation.
Filters belong on any critical-spares list. Our overview of the five spare parts every single-pass corrugated printer should stock places filtration alongside printheads and pumps as items a packaging plant cannot afford to source reactively.
ROKI LABO-PURE Ink Filters: 5, 10 and 20 Micron Ratings
For plants that want one filter family across several ratings, the ROKI LABO-PURE ink filter listed on our site is offered in 5, 10 and 20 micron versions of the LPM-SLP-050-N1 housing. Having all three ratings in the same platform simplifies stockkeeping: the same swap procedure, the same spare-element logistics, and one part number to communicate when you order. As with any cross-application filter, confirm material compatibility with water-based ink before switching from a ceramic duty cycle. Seal and membrane compatibility data is not published on the product page, so flag it for confirmation with your supplier before committing a full stock set.
Frequently Asked Questions
Can I use the same filter on ceramic ink and water-based ink?
Physically the element may fit, but compatibility is the real question. Water carries different wetting behavior than solvent, and seals or media not rated for water-based ink can swell or degrade. Check the manufacturer’s compatibility statement before reusing a ceramic-spec filter on a corrugated line.
Does a 5 micron filter slow my printer down?
It can, if the 5 micron element is installed where the circuit expects a lower pressure drop. The tighter media restricts flow more, and a pump with little margin will deliver reduced flow to the head. Keep 5 micron elements for final-stage duty close to the printhead.
What micron rating does my KINGTAU printer use from the factory?
The factory rating per model is not published on our product pages, so we will not guess it here. Send us your machine model and serial details through our contact page and we will confirm the correct element specification.
Why does my new filter clog faster than the old one?
A new element that loads quickly is doing its job, but it also tells you the upstream stage is passing material it should catch. Check whether the mainline filter is overdue for replacement and whether ink containers are being handled in a way that introduces skin or debris.
Get Help Selecting Corrugated Ink Filters
LEMSUN TECH supplies filtration, pumps, printheads and boards for industrial inkjet lines, including parts support for KINGTAU single-pass corrugated printers such as the SCB1600. If you are deciding between 5 and 10 micron filtration for a water-based line, or you need elements matched to your machine, contact our team with your printer model and current filter part number.
Post time: Nov-10-2026