Colored ceramics are decorative ceramics made from clay, whose surfaces are decorated with a colorful painting or glazing process that provides vibrant colors and a sense of artistry.

Overglaze and underglaze are two common ceramic decorative techniques, which are slightly different in their production methods and effects.

Underglaze is a process of applying color underneath the glaze of a ceramic product.

First, the painting is applied to the plain tire of the ceramic product, then a layer of transparent glaze is applied to cover the painting, and finally, it is fired at a high temperature.

During the firing process, the underglaze coloring material will flow under the glaze layer and blend with the glaze layer to form a unique artistic effect.

Underglaze colors are softer in color compared to overglaze colors and have a unique rendering effect, and are often used to paint landscapes, flowers and birds, and other subjects with a literati atmosphere.

Overglaze is a process of painting or coating the surface of ceramics with a colored glaze. After a ceramic product is fired at high temperature for the first time, it is then painted or coated with glaze on its surface and then fired at high temperature again.

This process ensures that the color remains unchanged, the colors are vivid, and it has a strong decorative and artistic sense.

Care needs to be taken to control the viscosity and color of the colored materials and the firing temperature when making glazes to ensure the quality of the products.

The pigments and glazes used in glazes need to comply with relevant safety standards to ensure the safety of the products. Under normal circumstances, glazes do not cause problems with excessive heavy metals.

However, if the manufacturer uses pigments and glazes that do not meet the standards, or if they are not properly controlled during the production process, there is a possibility that the heavy metal limit may be exceeded.

Heavy metal exceedances may cause certain effects on human health, when buying ceramic products, it is recommended to choose a brand guarantee, and legal compliance products, and pay attention to observing the product quality mark and related test reports.

In addition, when using ceramic products, attention should also be paid to whether the surface is broken or flaking to avoid pigments and glazes from penetrating the food.

In short, colored ceramics have become an integral part of people's lives and culture with their colorful and decorative properties.

Decorative techniques for colored ceramics are very diverse, including hand-painting, printing, engraving, and many other methods. Different processes and techniques can produce colored ceramic products with their characteristics, such as red pottery, celadon, and glazed red.

Color ceramics not only have decorative value, but also can be used as practical items in daily life, such as tableware, vases, and ornaments.

Colored ceramics are also widely used in the fields of architecture and gardening, such as tiles and mosaics.