Does this predict a Hegman reading?

No. Your approved process supplies the pass count, and grind testing confirms the result. Time and mass flow alone do not establish particle dispersion.

Can I use a batch high-speed disperser rate?

No. This model requires discrete full-batch mill passes with a measured mass flow. Use qualified stage times for a batch disperser.

What does cumulative mass mean?

It counts material processed on every pass. A 1,000 kg batch processed twice contributes 2,000 kg of mill workload, not additional finished product.

Where do grind checks and adjustments go?

Include their nonoverlapping duration in wet-out and sampling time. Additional full passes require changing the qualified pass count.

Coatings, Inks & Specialty Chemical Production calculator

Pigment Dispersion Time Calculator

Estimate time for a qualified sequence of discrete pigment mill passes. Enter slurry mass, measured pass rate, required passes and the remaining scheduled stages.

What this calculator does

Schedule discrete pigment mill passes from a qualified pass count and measured processing rate.

Formula used

Cumulative mass = slurry batch mass × qualified full passes
Mill pass time = cumulative mass ÷ measured pass rate
Dispersion hours = (mill pass time + wet-out and sampling minutes) ÷ 60
Schedule margin = allocated minutes − mill pass time − wet-out and sampling minutes

Inputs explained

Slurry Batch Mass: Weighed slurry mass routed through the mill.
Measured Mill Pass Rate: Verified mass flow for this slurry and mill setting.
Qualified Full Passes: Approved full-batch pass count demonstrated to achieve your grind.
Wet-Out and Sampling Time: Nonoverlapping wet-out, transfer, sampling and adjustment durations.
Scheduled Dispersion Slot: Time allocated for the full dispersion sequence.

How to use the result

Best suited to Two-Pass mill Scheduling, pigment campaign time checks.
Does not predict grind quality or required pass count. Does not model recirculating residence times or batch disperser mixing.

Current U.S. benchmarks

Industrial electricity averages 9.77 cents per kWh across the U.S. (EIA, Jul 2026), up 4.7% from a year earlier. Energy-intensive steps carry this directly into unit cost.
The producer price index for industrial chemicals stands at 336.006 (BLS, Aug 2026), up 13.3% from a year earlier. Quotes priced off last quarter's material cost miss this move.
The U.S. has 14,543 chemical manufacturing establishments employing about 911,245 workers (Census County Business Patterns, 2023).

Common questions

Does this predict a Hegman reading? No. Your approved process supplies the pass count, and grind testing confirms the result. Time and mass flow alone do not establish particle dispersion.
Can I use a batch high-speed disperser rate? No. This model requires discrete full-batch mill passes with a measured mass flow. Use qualified stage times for a batch disperser.
What does cumulative mass mean? It counts material processed on every pass. A 1,000 kg batch processed twice contributes 2,000 kg of mill workload, not additional finished product.
Where do grind checks and adjustments go? Include their nonoverlapping duration in wet-out and sampling time. Additional full passes require changing the qualified pass count.

Last reviewed 2026-10-01.