陶器在烧制前需要把粒度较细的陶土用水调和制成泥浆，然后淋到陶器胎面上，这样烧好后的陶器表面就附着一层薄薄的色浆，这种工艺叫做施“化妆土”。界首彩陶通常采用淋釉的方法施化妆土，分为两个步骤：施粉土、施白土。烧制后，粉土和白土分别呈红棕色和牙白色，形成界首彩陶独具特色的红白刻花样貌。

Before firing, Jieshou pottery undergoes a process called "applying makeup clay" (or slip), which involves coating the clay surface with a fine clay slurry. This layer of slip, when fired, forms a thin, colored surface on the pottery. In Jieshou Colored Pottery, this process is typically done using a pouring technique and is divided into two steps: applying the "Powder Slip" and the "White Slip." After firing, these slips give the pottery its distinctive red and ivory carved patterns.

施粉土·Applying Powder Slip

粉土俗称釉土，呈浅灰色粉末状，主要分布在界首境内的陶庄湖一带。将化妆土粉碎过筛、去除杂质，再将泥粉调制成泥浆，淋到泥坯表面。经过烧制后，粉土能呈现红棕色，这是界首彩陶三彩的底色。

The powder slip, also known as "glaze clay," appears as a light gray powder and is primarily sourced from the Taozhuang Lake area within Jieshou. The clay is finely ground, sieved to remove impurities, and then mixed with water to create a smooth slurry. This slurry is poured over the clay body, coating it evenly. During the firing process, the powder slip transforms into a rich reddish-brown hue, which forms the base color of Jieshou's tri-colored pottery.

施白土·Applying White Slip

待施粉土的泥坯彻底阴干后，即可再施涂白色化妆土，施涂工艺与施粉土完全一样。白土比粉土的质地更加细腻，烧出后呈牙白色。施涂白土需保证一定的厚度，以免出现透红、色彩不均匀等问题。

Once the piece with the powder slip has completely air-dried, the white slip is applied using the same pouring technique. The white slip is finer in texture than the powder slip and, after firing, takes on an ivory shade. To ensure the final piece has an even and consistent appearance, the white slip must be applied with a specific thickness to avoid color inconsistencies or areas where the underlying red shows through. This meticulous layering of slips is what gives Jieshou pottery its unique red and white carved appearance.