Coatings, Inks & Specialty Chemical Production worked example

Pigment Dispersion Time at 40% hegman grind check and viscosity adjustment allowance: a worked example

This scenario runs the pigment dispersion time calculation on the strong side: 40% hegman grind check and viscosity adjustment allowance, with every other input held at its documented default. scheduling pigment dispersion, grind, or mill-base processing time

The inputs for this scenario

  • Pigment slurry batch weight: 2,200 lb (unchanged)
  • Mill or high-speed disperser throughput: 28 lb / min (unchanged)
  • Hegman grind check and viscosity adjustment allowance: 40 % (raised for this scenario; the documented default is 35)

Working through the calculation

  • Applying the documented formula (Base pigment dispersion time = pigment dispersion workload รท mill or disperser processing rate) to the inputs above produces each figure below.
  • At this operating point the engine returns 110 hr for estimated pigment dispersion time, the number this scenario is built around.
  • At this operating point the engine returns 78.57 hr for base pigment dispersion time.
  • At this operating point the engine returns 40 % for hegman grind and adjustment allowance.
  • At this operating point the engine returns 28 pieces / min for mill or disperser processing rate.

How this compares with the baseline

  • Against the tool's baseline example, where hegman grind check and viscosity adjustment allowance sits at 35% and the headline result is 106 hr, this scenario comes in 3.7% above the baseline at 110 hr.
  • Use it when scheduling mill time, costing a new tint, or evaluating whether a hard-to-disperse pigment is worth a formulation or equipment change. Treat this as a target state: the delta against the baseline quantifies what the improvement is worth before you commit to chasing it.

Results at a glance

  • estimated pigment dispersion time: 110 hr (headline result)
  • base pigment dispersion time: 78.57 hr
  • Hegman grind and adjustment allowance: 40 %
  • mill or disperser processing rate: 28 pieces / min

Run it with your numbers

  • Every input above is editable in the live Pigment Dispersion Time calculator, which recalculates instantly and can be shared with the inputs intact.

Last reviewed 2026-05-12.