Substandard ceramic tableware may do harm to health, the ways to identify

Chinese eat not with silver plate iron fork, but glittering and translucent get rid of China, in one thousand, they are also one of the leading role on the silk road, its usage in the land even huge air, however, on the market the dazzle colour porcelain, is really safe? In this traffic than half are delivered little elder brother figure of the era, many experts have warned you one thousand times: & other; Some take-out often use plastic tableware, plastic heat toxic, some even can not be reused. ” Somebody thought, & other; O ok I are serve China plate & throughout; The lucky smile, can't help. But! ! ! Is! ! ! You know wedgwood China plate may not be safe? The so-called unsafe, mainly refers to the easy separation of heavy metals in the porcelain tableware, such as lead and cadmium. If a heavy metal elements in human body accumulation, may damage to liver and body system. How to determine whether porcelain tableware products to be safe, simple, basically see two things: ceramic materials, ceramic firing. Material: use the glaze color close attention on the ceramic raw materials including sludge ( Body material) , glaze ( Glaze raw materials) And painting materials ( Decorative materials) 。 Body is usually kaolin clay or raw materials, because no chemical belongs to add or natural clay minerals, so the basic safety. So who is bad? Glaze and painting materials! Here, families need to explain a few concepts: first, a professor on glaze color, glair, under the glaze color. Under the glaze color in short is the first color and glaze & ndash; — Embryo in raw or toasted element on the billet with painting material directly, then a layer of glaze kiln. A prototype can be traced back to song dynasty, with blue and white, youligong and glaze color is given priority to. Glair on green glaze, then on the surface of coloured drawing or pattern, after again on a layer of glaze. This is a decorative techniques developed in the 70 s, mainly paintings, decals. On the glaze color porcelain firing first white glaze, then directly in the glaze coloured drawing or pattern, again into the kiln. Second is lower than a firing temperature. In this method, the porcelain suit to be display show, because color is gorgeous, but sometimes is not suitable for high temperature food cheng fang. This is in the Ming dynasty created from under glaze blue coloured drawing or pattern on the basis of the way of how to paint, to the ancient, enamel, new colors and colored enamel mainly. In most cases, painting is low cost of chemical material, is likely to contain lead, cadmium and other heavy metals. Under the glaze color and glair with a layer of vitreous ( Glaze) Painting was wrapped in a material, also covered may contain heavy metals. So, what kind of porcelain risk at a glance: colored glaze. Because its draw materials will direct contact with food, easy to release of heavy metals in high temperature, produce harm to human body. It is safe to how to cook? High temperature! To determine whether ceramic tableware safety, in addition to see painting material whether direct contact with the food, but also the sintering temperature. Because in the process of high temperature calcination, harmful substances react after disappeared. Glaze is a form of vitreous glaze after high temperature processing, heavy metal element after such heat treatment ( 1200 degrees Celsius) After the basic will not remain. And color of color glaze, on baking temperature is only about 800 degree, cannot satisfy the above mentioned & other; High temperature & throughout; Conditions. This kind of circumstance, whether security will see paint material quality, the better the quality, the content of lead and cadmium lower nature. How to spot on the glaze color here, you must have special want to know how to identify the glaze color, glair and colored glaze. Simple method is to directly touch by hand. Glair and glaze color is outside a layer of vitreous body, so it feels very smooth, glaze color is uneven. If it is on the glaze color tableware, you can put it in the vinegar soak, take a look at a few hours later to see if there is visible to the naked eye fade even paint falls off. If there is, it is suggested that it is advisable to use less. In general, high temperature porcelain is safe. If you have painted decoration, so under the glaze color is safe. Color porcelain glaze, they are suitable for used as decoration, or cold. China would leave the grain in appliance with good quality, the lining is white or use under high temperature and glaze color decoration. In this way can not only better reflect food is ecru, also more healthy.