Iron Oxide Black 330 is a high-strength inorganic pigment commonly referenced as pigment black 11.It delivers consistent tinting strength and excellent weather fastness for coatings, inks, plastics and rubber. Use this pigment when you need a reliable deep black with low migration and strong compatibility across resins.
Ferroferric oxide Commonly known as the iron oxide black, magnets, magnet, black iron, with the black crystal magnetic, so it is also called magnetic iron oxide.
Iron Oxide Black 330 is a common iron oxide pigment used in developing building materials, paints, rubber, asphalt, sports racetracks, paper, plastic and others.
Iron Oxide Black 330 (Pigment Black 11) is produced via controlled oxidation and calcination to ensure consistent particle morphology and color strength. It is compatible with epoxy, alkyd, acrylic and PVC systems after standard dispersion procedures. For masterbatch and plastic compounding, pre-dispersion is recommended to minimize streaking.
| Density (g/cm3) | 4.5 |
| Appearance | Bluish black powder |
| Content of Fe2O3 % | 90 min |
| PH Value | 5.0-8.0 |
| Oil Absorption | 15-25 |
| Residue on 320 mesh,% | 0.5 max |
| Water soluble, % | 0.5 max |
| Volatile at 105 degree | 1.5 max |
| Tinting strength, % | 98-102 |
Note:The data contained here are based on our current knowledge and experience. It is the responsibility of user to test our products before the final application.
Yes — Iron Oxide Black 330 corresponds to the inorganic classification commonly listed as Pigment Black 11.
Typical specification ranges for our grade are: D50 ≈ 0.8–1.2 µm, oil absorption 18–22 g/100g, pH (10% slurry) 6.5–8.5. Compared with carbon black, pigment black 11 often has lower tinting strength but superior weathering and lower risk of migration in polar systems. For exact COA values (batch-specific) request the latest certificate — we provide COA and SDS with every shipment.
Best practice is pre-dispersing into a paste using bead milling to reach a target grind of Hegman 6–7 (or D50 ≈ 0.8–1.0 µm). Use 0.6–1.0 mm ceramic or glass beads for high-efficiency grinding. Typical paste recipes start at 30–60% solids for coatings/inks: adjust solids to your mill type.
Dispersant choices depend on the resin system: anionic polyacrylates / ammonium polyacrylates work well in aqueous acrylics; nonionic wetting agents (ethoxylated alcohols) help in solvent-borne systems; polyphosphate or sulfosuccinate types can aid in high-solid inks. Typical dispersant dosing: 0.5–2.0% (active) relative to pigment; trial runs are recommended to optimise gloss vs. rheology.
After milling, a let-down procedure with final surfactant/dispersant adjustments and a short de-aeration improves gloss and eliminates micro-bubbles. If you need, we can provide starter formulations for acrylic, alkyd and PP masterbatch systems.
Compatibility: IOB-330 is compatible with common resins (acrylics, alkyds, epoxy, PVC, polyolefins) after proper dispersion. For polar systems (waterborne acrylics, nylons), ensure adequate dispersant selection to avoid flocculation.
Migration: inorganic iron oxides generally show low migration compared with some organic black pigments, but migration depends on resin, plasticiser type and processing. For food-contact, medical or sensitive applications you must run migration and overall/volatile extractables testing per your target market standards (EU, FDA, etc.). We can supply history data and support sample testing.
Thermal stability: Pigment structure is thermostable under normal thermoplastic processing; typical safe-processing guidance is up to ~260–280°C for short residence times, but final behavior depends on the entire formulation (additives, stabilisers). Always validate in your processing line and send samples for application trials if needed.
