INK PRODUCTION SOLUTION
A practical guide to ink production using inline dispersion, horizontal bead milling, blending, filtration and filling equipment.
A production line normally combines liquid dosing, powder handling, pre-dispersion, wet grinding, letdown, filtration and filling. Each stage should be sized around pigment loading, binder system, viscosity, target fineness and batch frequency.
A conventional route uses a high-speed disperser before a vertical or horizontal bead mill. An integrated route can use an inline dispersion machine to induct, wet and de-agglomerate powder before horizontal bead milling, reducing the load on the grinding stage.
High liquid velocity creates a controlled vacuum for powder induction. The rotor-stator zone increases liquid surface area, wets powder rapidly and circulates the mixture for dispersion and de-agglomeration. A closed arrangement can reduce airborne dust and manual powder handling.
Disc bead mills are commonly selected for productive micron-scale grinding. Pin-type bead mills provide higher grinding intensity when narrow particle-size distribution or nano-scale targets are required. Mill volume, media size, tip speed, cooling and pass strategy must be confirmed by formulation.
For equipment selection, provide the liquid system, pigment type, solids content, viscosity, feed size, target fineness, batch size, hourly capacity, temperature limit and hazardous-area requirements. These inputs determine the process route and equipment configuration.
Liquids are charged first before pigments and additives are introduced under controlled shear. The objective is complete wetting without dry pockets, excessive air entrainment or a viscosity peak that prevents stable transfer to the mill.
The mill reduces agglomerates under controlled media loading, flow, speed and cooling. Samples should be compared at equal temperature using the same particle-size or fineness method before throughput is increased.
Resin, solvent, water or additives are adjusted in the finishing vessel. Final viscosity, shade and solids are confirmed before filtration removes oversized contamination and the product moves to filling.
A disc mill supports productive continuous grinding for gravure, flexographic and general industrial inks where stable micron-scale quality and high circulation flow are required.
A pin rotor creates higher grinding intensity and accepts smaller media for narrow particle-size distributions in inkjet, automotive, carbon-black and other fine dispersions.
A basket mill combines dispersion and grinding in one batch vessel. It suits frequent color changes, flexible batch sizes and plants that prioritize straightforward cleaning.
The formulation route determines materials, safety controls and the preferred grinding system.
| Ink type | Process characteristics | Typical equipment route | Key review point |
|---|---|---|---|
| Solvent-based ink | Resin solution, organic solvent and pigment | Closed disperser + horizontal bead mill + filter | Hazardous-area classification and seal compatibility |
| Water-based ink | Water, resin or emulsion, pigment and additives | Inline or high-speed disperser + disc bead mill | Foam control, corrosion and microbial management |
| UV ink | Reactive oligomer, monomer, pigment and photoinitiator | Temperature-controlled pre-mixing + pin bead mill | Heat exposure, viscosity and light protection |
These are preliminary engineering ranges, not guaranteed results. Material trials determine the final selection.
| Equipment example | Operating mode | Indicative production reference | Typical quality objective |
|---|---|---|---|
| 1000 L basket mill system | Batch | 500-1000 L working batch; evaluate roughly 45-120 minutes | Approximately 5-20 micrometres |
| 20-30 L horizontal disc mill | Continuous or circulation | Approximately 100-600 L/h depending on formulation | Approximately 5-10 micrometres |
| 20-30 L pin bead mill | Continuous or circulation | Approximately 40-250 L/h depending on viscosity | Fine micron to submicron range |
Use a calibrated fineness gauge for routine production checks and particle-size analysis when a distribution target is specified. Record sample temperature because viscosity and apparent fineness can change as the batch warms.
Viscosity must be measured with an agreed spindle, speed and temperature. Shade, color strength, gloss, solids and density should be checked against the approved method. Final filter rating is selected against pigment size, product viscosity and filling requirements rather than chosen as a universal value.
A useful production record connects raw-material lots, charging order, dispersion time, mill settings, sample results, filtration pressure and accepted output. This makes formulation variation distinguishable from wear, cooling or operating changes.
Uneven dispersion often begins with poor wetting, an unstable feed viscosity or powder charging faster than the liquid can accept it. Low grinding efficiency can result from unsuitable media size, low media loading, excessive flow, worn agitators or inadequate cooling. Foam is addressed by reducing air entrainment, reviewing pump return position, controlling shear and confirming that any defoamer is compatible with the formulation.
Change one operating variable at a time and sample consistently. Increasing speed or extending time without confirming temperature, viscosity and media behavior can consume more energy without improving saleable product quality.
FROM THE PRESENTATION
RELATED EQUIPMENT
The IDS Inline Dispersion Machine is a dust-free, continuous in-line disperser that rapidly mixes and disperses solids and liquids using a rotor-stator principle. It is suitable for a wide range of applications and process upgrades, combining wetting, blending, dispersing, de-agglomeration, dissolving, emulsifying, homogenization, powder induction, and dust-free operation in one machine.
View equipment →The PZP High-Efficiency Static Disc Bead Mill uses German-imported technology, including a static centrifugal discharge device and a large discharge area for higher throughput rates. Its design keeps beads away from the screen, allowing smaller beads to be used for efficient grinding. Grinding efficiency increases to more than 30% compared with regular models, and the grinding area uses a wear-resistant alloy for long service life under appropriate operating conditions.
View equipment →The PZB Pin Type Bead Mill (Sand Mill) is a high-energy wet grinding mill for a wide range of products and viscosity ranges. Its pin grinding system provides high grinding intensity and can use grinding media as small as 0.2mm in diameter, supporting nanometer-range fineness and high product throughput rates.
View equipment →We can offer Semi-automatic and full automation ink production lines according to customer capacity and working process. Can provide the whole production line design, equipment procurement and production, installation and commissioning.
View equipment →FREQUENTLY ASKED QUESTIONS
A typical line combines pre-dispersion, bead milling, letdown, filtration and filling. The exact route depends on the ink chemistry, viscosity, target fineness and production mode.
Choose a horizontal bead mill for continuous production and stable high throughput. Choose a basket mill for flexible batches, frequent color changes and simpler cleaning.
Zirconia media in approximately the 0.3-1.0 mm range is common, but media size and density must match the mill, pigment, feed size and target fineness.
Prepare a stable pre-dispersion, control slurry viscosity and temperature, select suitable media loading and maintain consistent flow. Inline powder induction can improve wetting before milling.
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