Nirbhay Rasayan Pvt. Ltd. Manufactures Phthalocyanine Pigment Blue 15.1. Nirbhay Rasayan Pvt. Ltd. Is the flagship company of the Kothari Group of Industries. Nirbhay Rasayan Pvt. Ltd. Offers varied Copper Phthalocyanine and Phthalo pigments. The Phthalocyanine Pigment Blue 15.1 is heat stable. This pigment is also known as Ennarcyanine alpha blue. The Phthalocyanine Pigment Blue 15.1 is applicable for plastic master batches.