Chinese black painted, white based porcelain, because of its decoration style, has been a focus of porcelain historians, scientists and enthusiasts. The Linshui kiln (also known as the Cizhou kiln) and Jiexiu kiln both produced black painted, white based porcelains. These two klins are closely related. Few scientific analyses of porcelains from these two kilns have been done. Therefore, comparative studies of them are lacking. Petrographic analysis, SEMEDS, etc. were used to analyze the body, masking clay and glaze of porcelain from these two kilns. The results showe that, the bodies of both are high in Al₂O₃, Fe₂O₃, TiO₂, but low in SiO₂, which made the porcelain look grayyellow, but the porcelain from the Jiexiu kiln contains more Al₂O₃. They both have masking clay. The results further show that there are two layers of masking clay in samples from Jiexiu kiln but only one layer in samples from Linshui kiln. In the case of the Jiexiiu kiln, the masking clay near the body (h1) contained more Fe₂O_3and TiO_2than the masking clay near the glaze (h2); in the case of the Linsui kiln, Fe₂O_3and TiO_2levels of the masking clay fall in between h1and h2. The results also indicate a high calcium glaze with porcelain of Jiexiu kiln, but an alkalicalcium glaze and calciumalkali glaze with porcelain of Linshui kiln. It is not difficult to realize that, based on the single layer of masking clay technology in Linshui kiln, that the Jiexiu kiln, with two layers of masking clay, had advanced the technology and produced better black painted, white based porcelain, even using coarse raw materials.