A solvent-stable, non-crystallizing alpha-form phthalocyanine blue delivering high tinting strength, a clean reddish-blue shade, and outstanding weather resistance. The preferred grade for solvent-based coatings, automotive paints, and high-performance rubber applications where crystal stability in solvent environments is critical.
Unlike standard alpha-phase PB 15:0, Pigment Blue 15:1 is surface-treated to be non-crystallizing (NC) in aromatic and ketone solvents. This prevents the unwanted crystal phase transition from alpha to beta form that can occur in solvent-based systems — maintaining the characteristic reddish-blue shade and preventing flooding, floating, and gloss reduction in high-solvent coatings.
| Property | Standard / Note | Rating |
|---|---|---|
| Lightfastness | ISO 105-B02 | |
| Heat stability | Up to 200 °C | |
| Solvent resistance | DIN 55983 | |
| Crystal stability (solvents) | NC treatment | |
| Colour strength | Tinting method | |
| Weather resistance | Exterior exposure | |
| Acid resistance | — | |
| Alkali resistance | — | |
| Migration resistance | — |
The NC modification makes PB 15:1 the preferred grade for OEM automotive coatings and industrial maintenance paints where solvent-based formulations are standard. Prevents crystal growth that causes flooding and gloss loss in high-solid systems.
Gravure and flexographic inks formulated with aromatic or ketone solvents require a non-crystallizing blue to prevent phase change during production and on-press. PB 15:1 delivers a stable, reproducible reddish-blue throughout the print run.
Used in PVC and polyolefin masterbatch systems where processing involves plasticisers or solvents. The NC treatment prevents crystal transformation under elevated processing temperatures in plasticised systems.
Strong, fade-resistant colouration for natural and synthetic rubber compounds including industrial seals, hoses, and moulded goods. Excellent UV and ozone stability for outdoor rubber applications.
Solvent-flushed paste and custom surface-treatment grades available for specific solvent systems. Specify your solvent type and application conditions when requesting a quotation.
Registered under EU REACH regulation. Full SDS available on request for compliance documentation.
Contains no lead, cadmium, mercury, or chromium VI. Meets international packaging and automotive directives.
Both grades share the same alpha crystal modification and reddish-blue shade, but PB 15:1 is specifically engineered for solvent-based systems where crystal stability is critical.
Unmodified alpha phase. Excellent for water-based systems and applications where solvent exposure is limited. More economical.
Surface-treated to prevent crystal phase transition in aromatic and ketone solvents. The correct choice for solvent-based coatings and automotive systems.