Pigment Blue 15:3 is a high-performance organic pigment from the copper phthalocyanine family. It produces a clean, strong, greenish-blue shade and is renowned for its exceptional durability. As it is insoluble in water, it is the ideal choice for creating non-bleeding, weather-resistant seed film coatings. Its excellent lightfastness and high heat stability ensure that the colour on the seed remains vibrant and stable through storage, planting, and germination.