Firing technique of blue-and-white underglaze red

Abstract

The invention discloses a firing technique of blue-and-white underglaze red, which comprises the following steps: 1) preparation of blank and glaze; 2) preparation of billet: making the blank into the billet, trimming, and airing for later use; 3) blue-and-white underglazing: drawing patterns or writing characters on the billet surface with a blue material and a copper red material, carrying out glaze application, and airing to obtain a blue-and-white billet; 4) firing: putting the blue-and-white billet into a kiln, controlling the kiln in an oxidizing atmosphere, heating to 300 DEG C at 100-120 DEG C/hour, and continuing heating to 950 DEG C at 150-200 DEG C/hour; and while controlling the kiln in a reducing atmosphere, heating to 1260-1360 DEG C at 40-60 DEG C/hour, keeping the temperature for 1-2 hours, stopping heating, cooling, and discharging out of the kiln to obtain the finished product. The blue material of the blue-and-white underglaze red porcelain has the advantages of bright color development and stable and uniform coloration, the red material has the advantages of bright coloration, no flying red and no blackening. The blue and red colors of the blue-and-white underglaze red porcelain contrast with each other and benefit each other.

Description

technical field [0001] The invention relates to a manufacturing process of ceramics, in particular to a firing process of blue and white underglaze red. Background technique [0002] Blue and white porcelain, also known as white ground blue and white porcelain, often referred to as blue and white porcelain, is one of the mainstream varieties of Chinese porcelain and belongs to underglaze colored porcelain. Blue-and-white porcelain is made of cobalt ore containing cobalt oxide as raw material. The blue-and-white porcelain body is painted with decorations, and then covered with a layer of transparent glaze. After high-temperature physical and chemical changes, the blue and white are consolidated between the glazes, which are not afraid of acid and alkali corrosion, are not easy to wear, never fade, and never peel off. Blue and white porcelain is famous for its freshness and beauty, innocence, delicate greenness, tranquility and elegance. The coloring of blue and white is sim...

AI Technical Summary

Problems solved by technology

Due to the different properties of the blue and white material and the underglaze red material, the underglaze red material is prone to redness, blackening, uneven coloring of the blue and white color material, and even pinholes and air bubbles on the glaze surface, seriously reducing the quality of porcelain.