... slicing, extracting, isolating, filtrating, purifying, concentrating, sterilizing, spraying and drying. The main ingredients are Crocin and Crocetin. Its powder color is ... black and will rarely change while the PH varies. The pigment’s water solution is stable under heat ... dissolved in water solution and water-based media. The amount should be better limited to between 0.02% and 0.1%. ...