The microcapsule used for paper was prepared using nature macromolecule material sodium alginate and chitosan as wall and a colorless dye oil as core by complex-coacervation.

• 采用天然高分子物质壳聚糖、海藻酸钠为壁材,无色染料油溶液为芯材,通过复合凝聚法制备纸用微囊。