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<p>Some<strong> </strong><a href="28ceramics.com" rel="noopener noreferrer" target="_blank"><strong>porcelain bowls</strong></a> are OK, others are not.</p><p><br></p><p>1. The main raw material of ceramics is kaolin. High-quality kaolin is non-toxic and has low microwave media loss. Ceramics made from such kaolin can be placed in the oven without toxicity. However, some ceramics made of kaolin doped with metal impurities are not suitable for microwave ovens. If placed in a microwave oven, they may be toxic and cannot be used.</p><p><br></p><p>2. If the color glaze on the ceramic is inferior product, putting such ceramic into the oven will also cause toxicity overflow.</p><p><br></p><p>3. Frozen ceramics cannot be put into the microwave oven immediately. Those who have experience know that if the ceramics and pottery just taken out of the refrigerator are immediately placed in the microwave oven, they may burst.</p><p><br></p><p>4. Ceramic bowls with metal edges are not suitable for microwave ovens. Metal products cannot be put into the microwave oven, so if the ceramic bowl has metal trim or metal pattern, it should not be put into the microwave oven.</p><p><br></p><p><br></p><p><br></p><p>Extended information</p><p>Ceramic tableware, the traditional concept of ceramics refers to all artificial industrial products using clay and other inorganic non-metallic minerals as raw materials. It includes various products made from clay or a mixture containing clay by kneading, forming, and calcining. From the roughest earthenware to the finest fine pottery and porcelain.</p><p><br></p><p>The main raw material for it is silicate minerals (such as clay, feldspar, quartz, etc.) taken from nature, so it belongs to the "silicate industry" category with glass, cement, enamel, refractory and other industries. The firing and application of ceramic tableware has a long history in China. It has a variety of shapes, colorful colors, cool and smooth feel, easy to wash, and is loved by people in China.</p><p><br></p><p>There are three methods for making ceramic tableware: on-glaze, under-glaze and medium-glaze. The flower paper made of pigments on glaze ceramics is pasted on the glaze or painted directly on the surface of the product with pigments, and then baked at low temperature. Because the baking temperature cannot reach the degree of melting of the glaze layer, the flower surface cannot sink. Into the glaze.</p><p><br></p><p>Touch the glaze-colored ceramics with your hands, and feel the flower surface has obvious unevenness. The baking temperature of the glaze-colored ceramics can make the glaze melt, the pigment can sink into the glaze, and it will be covered by the glaze layer after cooling. There is no obvious uneven feeling on the touch; all the decoration of the under-glazed colored ceramics is performed on the porcelain blank. After glazing, it is fired once at high temperature, and the flower surface is covered by the glaze layer. It looks bright, flat and smooth.</p>
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