对群青颜料粒子进行了微胶囊化研究，在其表面包覆一层无色耐酸壳膜，使其具有耐酸性，分析了影响胶囊化群青的耐酸性及色差的各种因素．通过对群青粒子扫描电镜图象进行计算机处理，建立了一种新的表面分形维数的求取方法，并用分形维数表征群青颜料粒子的表面形貌及其耐酸性 The research on the microencapsulation of ultramarine pigment particles was carried out. The surface of the ultramarine pigment particles was coated with a colorless, acid-resistant shell membrane to make it acid-resistant. Various factors affecting the acid resistance and color difference of the encapsulated ultramarines were also analyzed. A new method for calculating surface fractal dimension was established by scanning electron microscopy image of ultramarine particles. The surface morphology and acid resistance of ultramarine pigment particles were characterized by fractal dimension