APPLICATION EXPLORATION
Self-Dispersed White Pigment for Ceramic Inkjet: Opportunities and Testing
From aqueous dispersion to the final ceramic surface: understand where self-dispersed white pigment can contribute, and which questions still need experimental answers.
Can self-dispersed white pigment be used in ceramic inks?
It can be a candidate for development, but “ceramic ink” describes more than one technology. A white dispersion suitable for an aqueous textile ink is not automatically suitable for a fired ceramic decoration. The first decision is whether the printed object will enter a kiln or whether the image will remain as a coating on an already-fired surface.
| Route | What must work | Implication for aqueous white dispersion |
|---|---|---|
| Fired ceramic decoration | Printing, thermal processing and pigment–glaze compatibility. | Requires firing trials; initial white appearance is not proof of fired opacity. |
| Non-fired surface decoration | Ink-film formation, adhesion and service durability. | A possible formulation route with the appropriate binder, surface preparation and drying. |
| Conventional nonaqueous UV printing | Compatibility with reactive monomers, resin and curing. | A water-based concentrate is not a direct substitute for a nonaqueous UV millbase. |
For tiles or ceramic ware that will be fired, the body, glaze or frit and thermal cycle are part of the ink’s functional system. For a non-fired decorative coating, the main problem shifts to bonding a durable ink film to a smooth, often non-absorbent surface. These routes should have separate development specifications.
What self-dispersed white pigment contributes
Surface modification can introduce functionality that supports pigment dispersion in an aqueous vehicle. For an ink formulator, the potential benefits are improved wetting and control of aggregation, with opportunities to build colourant–vehicle compatibility. These are upstream formulation benefits: they need checking in the complete ink, not only in the supplied concentrate.
White pigment brings a particular challenge because dispersion stability and settling are not identical. A well-dispersed TiO2 particle can still settle under gravity. Sediment hardness, redispersibility, circulation performance and nozzle recovery therefore matter alongside particle size and viscosity. A single D50 result cannot describe all of these behaviours.
Nor does “smaller” always mean “whiter.” Optical scattering depends on particle size, distribution, refractive-index contrast and the surrounding film. KRONOS discusses particle-size optimisation for opacity in its ink-grade literature, illustrating why white-pigment development should target an optical and processing balance rather than the smallest achievable particle. Source: KRONOS ink grades brochure.
Why high-temperature firing needs a separate answer
In fired decoration, the pigment interacts with its surroundings during heating. Dissolution, reaction and changes in phase or microstructure can alter the final appearance. The useful question is not only whether TiO2 withstands heat, but whether it produces the required white effect in the actual glaze and firing cycle. Ceramic-colourant research emphasises the relationship between material composition, application and firing conditions. Source: Ceramic pigments and dyes beyond the inkjet revolution.
Any organic surface functionality should not be assumed to survive kiln firing or retain its pre-firing dispersing role. Its thermal decomposition must also be considered within the complete ink and glaze system. A colourant can jet successfully yet produce an unacceptable fired finish; conversely, a promising fired pigment may still need significant work to become a reliable inkjet dispersion.
Water itself does not rule out ceramic digital decoration. Torrecid publicly describes ECOINK CID as a water-based digital glazing and decoration solution for ceramic and glass. That establishes a commercial aqueous route, not compatibility of an arbitrary water-based white concentrate. Source: Torrecid innovation overview.
A practical qualification plan
1. Define the customer’s process
Record the ceramic substrate, glaze or frit, layer sequence, peak firing temperature, dwell time, atmosphere and cooling cycle. For non-fired work, record the surface finish, cleaning or primer, binder, drying or curing method and intended service conditions. Also identify the printer, printhead and approved vehicle type.
2. Qualify the complete ink
Measure viscosity at a stated temperature, surface tension, pH where relevant, particle-size distribution and filterability. Check compatibility after adding resin, humectants and other ingredients. Review coarse-particle tails, sedimentation and redispersibility, then evaluate storage, circulation and printhead operation within an agreed test protocol.
3. Print representative samples
Use a range of ink laydowns on the actual substrate. Inspect wetting, drop placement, pinholes, edge definition and drying. A paper drawdown or textile print cannot stand in for a ceramic trial. Include an existing qualified white system as a comparison where available.
4. Evaluate after the final process
For fired samples, assess whiteness and colour coordinates, opacity at a defined layer build, glaze interaction, gloss and surface defects after the real thermal cycle. For non-fired coatings, assess adhesion, abrasion, water and chemical resistance appropriate to the intended use. If products are intended for food contact, commission the relevant finished-article compliance evaluation rather than relying on pigment documentation alone.
5. Scale only after repeatability is demonstrated
Retain samples and link results to batches, substrate and process settings. Move from laboratory trials to a controlled pilot run before adopting a new colourant. Agree acceptance limits with the customer rather than inventing one universal ceramic ink specification.
Where AIC-WHITE S701 fits in the discussion
AIC-WHITE S701 is our self-dispersed white pigment dispersion development platform, positioned around high whiteness, hiding power and storage stability. This article explores an additional application direction; it does not establish S701 as a qualified ceramic inkjet grade. No ceramic firing-performance dataset is presented here.
AIC supplies pigment dispersions as formulation ingredients, not ready-to-print ceramic ink. A ceramic project would require a dedicated vehicle, compatibility studies and end-process validation. For an aqueous non-fired coating, S701 can be discussed as a candidate starting material; for fired decoration, pigment–glaze and thermal behaviour must be investigated first.
Explore AIC-WHITE S701 and AIC surface-modification technology. Send the substrate, ink vehicle, printhead and thermal process with your enquiry so the discussion starts with the right development route.
Frequently asked questions
Can a textile white dispersion replace a ceramic white ink directly?
No. The supplied concentrate and finished ink perform different roles, and ceramic service or firing conditions need their own qualification.
Does self-dispersion remove the need for binder or frit?
No. Aqueous dispersion stability is distinct from coating adhesion or the function of a ceramic glaze/frit.
Is UV printing on ceramic the same as water-based ceramic printing?
No. UV refers to a curing mechanism, while water-based describes a vehicle. Conventional nonaqueous UV and waterborne UV are different formulation systems.