Basket Mill for Paint & Ink: Setup, Media & When to Choose It

Quick answer: Why basket mills suit paint and ink production, how to set one up, bead and media choices, and when a basket mill beats a bead mill for small batches and fast colour changes.

A basket mill is an immersion mill: the grinding basket — a perforated container of beads and an agitator — is lowered directly into the batch vessel. For paint and ink makers running many colours in relatively small batches, that simplicity is the whole point. There is no separate pump, no external chamber to purge, and colour change is as fast as lifting the basket out and rinsing it. This guide covers how to run a basket mill for paint and ink, and where it beats a conventional bead mill.

Why Basket Mills Suit Paint & Ink

Paint and ink production is defined by variety and frequency of changeover. A basket mill shines here because:

• The batch vessel is the mill — no transfer, no separate grinding circuit.
• Colour change is a rinse of one removable basket, not a full pipeline purge.
• Small to medium batches are handled without scaling the equipment.
• Operator involvement is low and the footprint is compact.

Basket Mill for Paint: Setup and Media

For architectural and industrial paints, run the basket in the same vessel you disperse into. Typical practice:

• Use 0.8–1.5 mm zirconia or glass beads for paint viscosity ranges.
• Pre-disperse with a high-speed disperser, then finish in the basket mill to the target fineness.
• Control temperature — paint rheology shifts with heat, so keep cooling in mind on long runs.

See the basket mill specifications and selection guide for chamber sizes and motor power.

Basket Mill for Ink: Liquid, UV and Offset Bases

Ink is less forgiving than paint — transparency, gloss and stability are tight. A basket mill is well suited to:

• Liquid inks where a single vessel disperses and finishes.
• UV inks needing consistent fineness for cure and clarity.
• Offset bases where colour strength must be repeatable across small lots.

Our basket mill for offset ink note goes deeper on formulation and setup.

Basket Mill vs Bead Mill for Paint & Ink

• Choose a basket mill for frequent colours, small–mid batches, and minimal transfer.
• Choose a bead mill for high, steady throughput where changeover is rare — see how to choose a bead mill for ink and paint.

Cleaning and Changeover

This is where basket mills win. Lift the basket, rinse or wipe it, and the vessel is ready for the next colour. Our guide to reducing basket mill cleaning time lists practical steps to cut purge loss between colours.

Sizing a Basket Mill for Your Batch

Basket mills are sized around the batch vessel, not the other way round. Three numbers decide the match:

• Batch volume — the basket must sit fully immersed with enough freeboard for the vortex; POLYC basket mills span roughly 2–1,500 L.
• Basket diameter versus vessel diameter — a basket around one third to one half of the vessel diameter gives good circulation without dead zones.
• Media size — 0.8–1.5 mm zirconia for paint, 0.6–1.0 mm for ink; finer media needs a smaller gap and more frequent inspection.

Throughput per batch is set by the number of passes, tip speed and the rheology of the millbase. Thick millbases need more passes at lower speed; low-viscosity inks can be finished in fewer passes.

Common Operating Problems

• Slow fineness drop — usually media too large, basket gap worn, or the millbase too viscous to circulate.
• Temperature rise — long runs in a jacketed vessel need cooling water; heat shifts paint rheology and can flocculate pigment.
• Colour contamination — beads and basket must be rinsed between colours; a dedicated rinse station cuts changeover time.
• Bead loss — check the screen and gap; worn seals let beads escape into the batch.

Frequently Asked Questions

Planning a paint or ink line and weighing a basket mill against a bead mill? Talk to our application engineers — POLYC has supplied wet-grinding lines since 2006, with ISO 9001 and CE equipment shipped to 80+ countries.