The Dapo kaolin deposit in Guangdong province is of weathering residual type of granite. Kaolin ores have considerable reserves and possess good quality with, especially, very high natural whiteness; they therefore can be used as excellent materials for papermaking. Mineral composition of kaolin is simple and consists mainly of kaolinite and quartz with small amounts of illite and montmorillonite as well as negligible halloysite. Kaolinite makes up 43% and quartz 47% in samples less than 320 mesh and to 91% in the coating kaolin Iess than 2μm in size in which quartz content decreases to <1%or so. There is an evident difference in grain-size distribution between kaolinite and quartz, and the latter is mainly concentrated in grain size over 45pm, which is very favorable for ore dressing. Chemical analyses of kaolin are AI203 31.71%，SiO2 55.71%，Ti02 0.14%，Fe203 0.19%,K20 0.06% and Ig. loss 11.02% for samples below 320 mesh, and A1203 37.76%，SiO2 44.87%，TiO2 0.O1%，Fe203 0.58%，K2O 0.07% and Ig. loss 14.22% for coating kaolin below 2}m in size. The simple chemical composition and very low content of impurities such as Fe209 and Ti02 account for the purity of ores and high whiteness of kaolin. Studies show that mineral composition of the Dapo kaolin deposit is quite fit for papermaking. Kaolinite has high degree of order and regular crystal form, causing kaolin to have good quality of coating. The papermaking coating experi-went of Dapo kaolin samples indicates that the costing paper has rather high smoothness, suggesting that the Dapo kaolin is a good-quality raw material for papermaking.