Application

Gravimetric Feeding in Cosmetics Production

Answer in brief

Cosmetics production doses very fine powders in small quantities, and colour is unforgiving.

A pigment feeder that carries over between shades produces a batch that looks wrong long before any analysis is run.

Design for complete emptying and visual cleanliness.
Expect flooding behavior from ultrafine pigments.
Keep the dust contained; these powders travel.

Reviewed October 21, 2026 · Updated October 21, 2026

The problem

Pigments and talc are ultrafine, aerate readily and stain everything they touch, which makes both accuracy and cleanliness difficult at the same time.

Desired outcome

A feeder that holds the set rate across the required turndown, with an inlet condition it can cope with and an installation that does not corrupt the weight signal.

Process approach

Small twin screw feeders with agitated hoppers handle these powders, and the hopper is sized so that it empties completely between batches.

Deaeration volume and controlled refill prevent the flooding behavior that otherwise destroys the dosing accuracy.

Enclosure and extraction at the charge point keep pigment out of the room and off adjacent products.

Complete emptying between shades, verified visually.
Deaeration and controlled refill for ultrafine powders.
Enclosed charging with local extraction.

Selection factors

Inclusion rate of pigments and actives.
Aerated and settled bulk density.
Changeover frequency between shades.
Dust exposure limits for the powders handled.
Batch size and the smallest quantity dosed.

Common failure modes

Pigment carryover between shades
Ultrafine powder flooding through the feeder
Hopper geometry that never fully empties
Dust escaping and contaminating adjacent products

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