The series liquid colorant products are used in the leather industry for coloring, with strong coloring power, bright and transparent colors, high glossiness, colorless migration, precipitation, and aggregation. They can perfectly solve the contradiction of poor traditional color essence performance and poor color paste permeability, and have good compatibility with other resins. At the same time, compared to dyes or colorants, their migration and light resistance have also been significantly improved, and their application in PU synthetic leather dry process and some post-treatment processes has significant advantages and effects.