Water-Based Flexographic Surface Inks
Converters running surface-printed packaging, labels and overwraps need a water-based flexographic surface printing ink that transfers cleanly from their anilox, holds color on the substrate, and dries within the flexo deck budget. chemlinkai matches the ink to your anilox volume, plate and substrate combination, with the first trial defined by the cells you already own.
How the system works
Flexo quality is decided before the ink reaches the plate: anilox volume and screen count set how much ink is transferred, and the ink must be tuned to that metering instead of fighting it.
We start from your anilox specification and substrate, because the same ink that prints well from a 6 cm³/m² cell will band or starve from a different screen count. Color strength, viscosity and drying are then set so the ink levels on the plate, transfers cleanly to the substrate, and dries within the available deck length at your line speed.
- Ink rheology matched to your anilox volume and line screen
- Color strength built for the film weight your cell geometry delivers
- Drying balanced against deck length, speed and substrate absorbency
- Surface-print targets: rub, heat seal, and rewound-blocking behavior
Why does flexo print quality drift between runs — and how is it stabilized?
Most flexo variation is not the ink recipe but the metering system: anilox wear, cell plugging, and doctor blade pressure change the delivered film weight, so the same water-based flexographic surface printing ink prints darker or lighter between runs. On absorbent substrates a second variable appears — the substrate pulls water from the ink, raising viscosity in the tray and shifting color mid-run.
We stabilize what formulation can stabilize, then give you the process controls for the rest. The ink is built with a flat viscosity response and controlled drying-in-tray behavior; we also specify the anilox condition check and the viscosity window to hold on the line. The result is a working range your operators can manage without daily formulation changes.
Representative system parameters
Guidance ranges for flexo surface inks before a trial. Final values depend on your anilox and substrate.
| Parameter | Representative range | Remark |
|---|---|---|
| Solids content | 30 – 45 % | Balanced for color strength at flexo film weights |
| Viscosity (Zahn 3 cup, 25 °C) | 18 – 30 s | Window matched to your anilox and pump system |
| pH | 8.0 – 9.5 | Held by buffer for in-tray stability |
| Fineness of grind | ≤ 5 μm | Checked per production batch |
| Drying response | Method-specific — set by trial | Verified at your deck length and speed |
| Foam control | Method-specific — set by trial | Circulation test before the press trial |
| Storage stability | 6 months sealed, 5 – 35 °C | Re-dispersion procedure provided with supply |
Representative ranges for system selection — typical values — batch TDS on request.
Where the surface print sits in the structure
In surface printing the ink is the outermost layer of the package — it faces rub, heat seal and handling directly, so film hardness and slip are set for the surface role, not buried under a laminate.
Verified data on transfer, drying and surface-performance tests is published after customer and company approval. Request current test results via the form.
Flexo surface inks — common questions
Direct answers for flexo printers, converters and purchasers.
What anilox information do you need for the first recommendation?
Anilox volume and screen count for each color deck, plus line speed and dryer length. With those three inputs we can set the starting viscosity and color-strength target without a lab visit.
Do you supply inks for both film and paper surface printing?
Yes, but as separate qualifications. Absorbent paper and non-porous film place opposite demands on drying and film formation, so we do not blur the two into one product.
How is color consistency maintained across production batches?
Each batch is released against the agreed strength and shade target, with grind and viscosity recorded. Retained samples support traceability if your press sees a drift.
What are the ordering and delivery terms for trial ink?
Trial quantities are supplied under the trial agreement; production terms — MOQ, lead time, packaging — are confirmed in the commercial proposal before volume supply starts.
Can you help with foaming problems on our circulation system?
Yes. Foaming is usually a formulation and system interaction. We run a circulation test with your pump type and adjust the defoamer package to the shear you actually generate.
Documentation
Documents are released per application and destination after final verification.
Documents marked “pending” are released after final verification — request the current version through the form and we will send it with the applicable scope.
Send your anilox data and substrate.
Cell volume, screen count, substrate type and line speed — our engineers return a starting system and the viscosity window to run it. The first trial is defined around your tooling.