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Three important processes of ceramic cup firing

August 21, 2022

The so-called ceramic cup is a cup made of clay. This cup has a beautiful shape and rich patterns, and is favored by the majority of consumers. Ceramic cups are mainly made of clay, ceramic soil and other clay, plus lime glaze and colorant, and are fired at high temperature through multiple processes. The main feature of the ceramic cup is that the high temperature will not release toxic and harmful substances from the ceramic cup, so it can be safely used. So what are the main firing processes?

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1. Glaze application: in the process of glaze application, the common round mouth dip glaze (immerse the green body into the glaze basin and put it out immediately when the mouth edge is flush with the glaze surface) or glaze application (pour the glaze slurry into the green body and shake it so that the glaze is evenly applied up, down, left and right, and then pour out the excess glaze slurry quickly), Chopping utensils (compared with "round utensils", the "round utensils" refer to round utensils, such as bowls, plates, dishes, etc., which are formed by drawing the blanks. The utensils with more complicated molding processes, such as bottles, zuns, pots, cans, etc., are called "chopping utensils") or large round utensils are blown with glaze (the method is to cover the bamboo tube with fine yarn, dip it in the glaze, and then blow it with the mouth. After repeated times, the glaze layer with uniform thickness can be obtained on the green surface).

2. Kiln burning: kiln burning is a time-consuming step. The time course is about one day and night, and the temperature is about 1300 ℃. First build the kiln door, burn the kiln, use pine as fuel, guide the piling process, measure the fire temperature, master the kiln temperature change, and determine the ceasefire time.

3. Colored glaze: glaze color, such as multicolor, pastel, etc., It is to draw patterns and fill colors on the fired porcelain glaze, and then put it into the red furnace for low-temperature baking at about 700 ℃ - 800 ℃. In addition, before firing the kiln, paint on the green body, such as blue and white, underglaze red, etc., It is called underglaze red, which is characterized by never fading under high temperature glaze.

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