Pigment blends combine very fine colourants with fillers and extenders at very different bulk densities. The colour is set by how evenly those fractions are distributed, and by whether the agglomerates survive the mixing step intact.
For dry blends, ribbon and plough mixers at 100–4,000 L cover most of the range. Where the pigment must be wetted or coated, a plough mixer with an injection lance or spray bar does the dispersion in one vessel. For masterbatch and ink intermediates, the same machine with a heating jacket handles the higher-viscosity stage.
Four things that decide batch-to-batch colour
De-agglomeration
Pigment powders arrive agglomerated. High-intensity plough action with choppers breaks the agglomerates down instead of merely wetting their outside.
Low-dose control
Tints and shading colours are often below one percent. Staged addition into a carrier portion is the reliable route to a repeatable shade.
Cross-contamination
Colour carry-over between batches is a cleaning problem before it is a mixing problem — full discharge and accessible surfaces matter.
Dust and containment
Fine organic pigments are dusty and often hazardous. Enclosed charging and conveying keeps the plant clean and the operator out of the cloud.
Typical pigment and dye work
Organic pigments
Phthalocyanine blues and greens, quinacridones and azo pigments blended into carrier powders.
Inorganic pigments
Titanium dioxide, iron oxides and carbon black — dense materials that separate from light fillers unless the mixing action keeps folding the bed.
Powdered dyes
Textile, plastics and specialty dyes blended to a target shade, usually in smaller batches with tight colour tolerance.
Fillers and extenders
Talc, barytes and calcium carbonate blended into pigment concentrates, where dust control is the main equipment decision.
Dry powder paints
Colourant, filler and binder blends for powder coating, with attention to discharge segregation.
Masterbatch and ink intermediates
Polymer and pigment pre-mixes at higher viscosity, using heated plough or double paddle machines.
Pigment-duty equipment
Plough Shear Mixer (LDH)
High-intensity fluidised mixing with choppers and liquid injection for dispersion and coating in one step.
View specifications → Volume workhorseRibbon Mixer (WHJ)
Dry pigment and filler blending at 100–4,000 L, with spray bar for oil or binder addition.
View specifications → Viscous mixesDouble Paddle Mixer (DPM)
Twin paddles in a W-trough for paste-like masterbatch and ink intermediates.
View specifications → Dust-free transferVacuum Conveyor (VC)
Closed transfer of fine colourants between charging, mixing and packing.
View specifications →Read next
Frequently asked questions
How do you stop colour drift between batches?
Fix three things: the addition order, the premix stage for low-dose colourants, and the cleaning routine. Longer mixing is rarely the answer — over-mixing a free-flowing blend can separate it again.
Can one machine do dry blending and liquid coating?
Yes. A plough mixer with an injection lance and choppers covers both, which is why it is the usual choice where a pigment is wetted or encapsulated rather than just blended.
What about titanium dioxide dust?
Enclosed charging, dust collection at the fill point and vacuum transfer rather than manual handling. TiO2 is fine and packs into a dust cloud very easily.
Need dyes & pigments equipment?
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