When to specify dry powder pigment versus flushed (pre-dispersed) pigment paste, covering process efficiency, cost, and application fit.
Pigment manufacturers can supply pigment in two main forms: dry powder (pure pigment crystals to disperse later) or flushed paste (pigment pre-dispersed in oil or water vehicle). Each has clear advantages and constraints. Choosing the right form factor optimizes both cost and process efficiency.
| Property | Dry Powder | Flushed Pigments |
|---|---|---|
| Form | Dry crystalline powder (typical 25kg paper bag or HDPE drum) | Pre-dispersed paste (typical 25kg or 200kg drum) |
| Pigment content | 98-99% pigment + binder/treatment | 30-50% pigment + 50-70% vehicle |
| Storage shelf life | 2-3 years (sealed) | 12-18 months |
| Shipping weight per kg of color | 1.0 (pure) | 2-3x (vehicle adds weight) |
| Dispersion required | Yes, full dispersion in your binder/vehicle | Already dispersed; just blend into matching vehicle |
| Process equipment needed | Bead mill or three-roll mill for solvent paints; high-shear disperser for water-based | Low-shear mixer sufficient |
| Cost per kg of pigment color | Lower | Higher (vehicle cost + manufacturing premium) |
| Best for | High-volume manufacturers with dispersion equipment, masterbatch makers | Smaller paint/ink houses, water-based and gravure ink producers |
Choose dry powder when: you have dispersion equipment (bead mills, three-roll mills, high-shear dispersers), high-volume production justifies the dispersion infrastructure, you want lowest per-kg pigment cost, or you're making plastic masterbatch (extruder is the dispersion device).
Choose flushed paste when: you don't have dispersion equipment, your batch sizes are small/variable, you're producing water-based or gravure inks (where flushed pigment is industry standard), or you want lowest production complexity. Flushed pigments add convenience cost but eliminate operational risk.
The pigment chemistry is identical, but the surface treatment may differ. Flushed pastes are often surface-treated specifically for the vehicle they're dispersed in (oil-based, water-based). When switching forms, validate that the new form's surface treatment is compatible with your binder system.
Yes, typically 30-60% more per kg of equivalent pigment color. The premium covers the dispersion manufacturing cost, additional vehicle weight in shipping, and shorter shelf life. The trade-off is meaningful only when you can't or don't want to do dispersion in-house.
Technically yes, but it requires industrial dispersion equipment (bead mill, ball mill, or three-roll mill) and the right vehicle selection. Most small/medium operations are better off buying flushed paste from the supplier. Large operations with existing dispersion equipment usually start from dry powder for cost economics.
Share your binder system, processing temperature, and required performance, and we'll recommend the right grade and ship a free 50-100g sample for qualification.