Don't let tableware become "cupware"! Do you know these knowledge about tableware

There are many types of tableware, common ones are ceramic tableware, enamel tableware, melamine tableware, glass tableware, wooden tableware, stainless steel tableware, plastic tableware, etc. At present, there are many disposable tableware on the market. This kind of tableware is easy to use but the quality is uneven, so you should pay special attention when using it.

Below, the editor will introduce to you three commonly used tableware: ceramic tableware, melamine tableware and stainless steel tableware.

Ceramic tableware is found in almost every household and is the most common. Ceramic tableware has a variety of designs and colors, different shapes, delicate and smooth. Beautiful and elegant, with the characteristics of no rust, no corrosion, no water absorption, easy washing, and strong decoration.

For ceramic tableware, the following two aspects should be mainly concerned:

First, the amount of dissolved heavy metal salts harmful to human health such as lead (cadmium) must meet the standards. Ceramic tableware used to be recognized as non-toxic tableware. However, in modern times, people have discovered that some inferior ceramic tableware contains heavy metals such as lead and cadmium. Inferior products are mainly some small ceramic enterprises. In order to reduce costs, these enterprises use cheap decorative pigments with high lead (cadmium) content and unstable performance, or the kiln is too densely packed. Generally, the ceramic tableware produced by small manufacturers is concentrated, so when purchasing, try to choose ceramic tableware produced by large manufacturers.

The second is that due to direct contact with heated food or cooking and grilling for food, it is required that the product must withstand the impact of cold and heat.

It is understood that ceramic products are divided into three types: overglaze color, underglaze color and inglaze color according to their different decoration methods, and the amount of lead (cadmium) dissolved mainly comes from the overglaze decoration material on the surface of the product.

The overglaze color is made by pasting the decals made of overglaze ceramic pigments on the glaze surface or directly painting on the surface of the product with pigments, and it is made by high temperature. Because the melting temperature of the glaze layer has not been reached, the picture cannot sink into the glaze, but can only cling to the surface of the sub-glaze layer. When touched, it will feel uneven.

Therefore, when buying ceramic tableware, it should be noted that ceramic tableware with too bright colors may not be good, especially ceramics with prickly, spotty or even cracked surfaces. Make cutlery.

Melamine tableware is actually melamine tableware. This type of tableware has developed rapidly and has high cost performance. It has been widely used in catering chain stores, food courts, university (university) canteens, hotels, enterprises and institutions, advertising gifts and other fields. , chopsticks, plates, bowls and other tableware made of melamine are very common.

Regular melamine tableware has many advantages, such as low thermal conductivity, ceramic texture, smooth surface, not easy to be stained, good water resistance, good washing performance, bump resistance, impact resistance, not easy to break, and tableware has a longer replacement cycle. The melamine tableware produced by regular manufacturers is safe and hygienic, non-toxic and tasteless, the surface is very smooth, the lotion is very convenient, it can automatically extinguish the arc, the texture is tough and strong, durable and not fragile, it can be said to have many benefits!

However, some consumers will have concerns about the "melamine" in it. In fact, melamine tableware is essentially a kind of plastic product. Its main raw material is high-purity melamine resin, which is processed by adding cellulose through a certain process. The melamine resin is a polymer compound formed by the polymerization of melamine and formaldehyde. Melamine is an important nitrogen heterocyclic organic chemical raw material. Melamine tableware is a high-purity melamine-formaldehyde resin formed by the condensation of melamine and formaldehyde. There is almost no free melamine and formaldehyde monomer in qualified products, and it will not cause harm to people.

The migration amount of melamine in melamine tableware is related to the migration time, migration temperature, and migration soaking solution. The longer the migration time and the higher the migration temperature, the greater the migration amount. Therefore, consumers should pay attention to the heating temperature not to be too high when using melamine tableware, avoid heating in a microwave oven, using at high temperature or containing oily food, etc., and try to avoid using it under acidic conditions.

Stainless steel tableware is favored by consumers for its beautiful appearance, corrosion resistance, and moderate price. Many families like to use stainless steel spoons and bowls for children, which are not easy to break and breed bacteria, and are very convenient to clean.

However, you know what? Stainless steel tableware is divided into several types, friends should recognize it when buying!

201 stainless steel: high manganese low nickel stainless steel, low nickel content, poor corrosion resistance, mostly used in the production of low-end tableware.

430 stainless steel: Iron + more than 12% chromium can prevent oxidation caused by natural factors, but 430 stainless steel cannot resist oxidation caused by chemicals in the air. And there are cases of oxidation (rust).

304 stainless steel: We generally have 18-8 stainless steel and 18-10 stainless steel, both of which have excellent corrosion resistance and heat resistance. Both of these are high-grade tableware materials, and the nickel content is very important, which directly determines the corrosion resistance and value of stainless steel. Therefore, brand companies will mark 18-10 stainless steel on the bottom of the pot to facilitate consumers to buy.

Do not wash with strong alkaline or strong oxidizing chemicals such as baking soda, bleach, sodium hypochlorite, etc. Because these substances are strong electrolytes, they will chemically react with stainless steel, thus destroying the surface luster of stainless steel tableware.

Do not burn it empty. Compared with iron and aluminum products, stainless steel tableware has a lower thermal conductivity and slower heat transfer time. Empty firing will cause aging and peeling off of the surface of the cooker.