Ceramic bowls, imitation porcelain bowls, stainless steel bowls, plastic bowls, wooden bowls, glass bowls... What kind of bowl do you use at home?

In daily meals, bowls are one of the indispensable tableware. But have you paid attention to the bowls used for eating?

Today, let's take a look at which bowls are inferior and what kind of bowls should be selected.

1. What are the possible hazards of imitation porcelain bowls? 

The texture of the imitation porcelain bowl is similar to a ceramic bowl. Not only not easy to break, and has a good heat insulation effect but also does not stick to oil and is easy to clean. It is widely favored by restaurant owners.

Imitation porcelain bowls are generally made of melamine resin material, also known as melamine-formaldehyde resin. Melamine resin is a resin formed by the polycondensation reaction of melamine and formaldehyde, which is bonded and thermally cured under high-temperature conditions.

Seeing this, many people are full of questions, "melamine"?! "formaldehyde"? ! Isn't this poisonous? Why can it still be used as cutlery?

In fact, the quality melamine resin tableware will not produce formaldehyde and other harmful substances during normal use.

Melamine resin tableware produced by regular factories will generally have a logo, prompting.

The use temperature is between -20°C and 120°C. Generally speaking, melamine resin is completely non-toxic at room temperature.

The temperature of the hot soup generally does not exceed 100 ℃, so you can use a bowl made of melamine resin to serve the soup. But it cannot be used for freshly fried chili oil, because the temperature of chili oil is about 150 ℃, which will melt the melamine resin and release formaldehyde at such a high temperature.

At the same time, some studies have shown that the migration of formaldehyde increases significantly after using imitation porcelain bowls to hold vinegar at 60 °C for 2 hours.

It is not recommended to use imitation porcelain bowls to hold acidic liquids for a long time.

Due to the poor quality of the craftsmanship in some small factories, the raw formaldehyde will remain in the bowl if the raw material is not fully reacted. When the surface of the bowl is damaged, it will be released. Formaldehyde has been identified by the World Health Organization as a carcinogenic and teratogenic substance, and it has become a major killer that threatens human health.

2. Is the heavy metal in the stainless steel bowl exceeding the standard?

Compared with bowls made of ceramic bowls, glass bowls, imitation porcelain bowls, etc, stainless steel bowls are the most durable.

Stainless steel is usually made of iron as the matrix and then smelted by adding metals such as chromium, nickel, manganese, and molybdenum, which are also mixed with metal impurities such as lead and cadmium.

Using inferior stainless steel bowls to hold food, the above metal elements are very likely to migrate, and accumulation in a certain amount in the human body will lead to heavy metal poisoning.

The researchers used an inductively coupled plasma mass spectrometer method to determine the migration of arsenic, cadmium, lead, chromium, zinc, nickel, manganese, copper, aluminum, iron, cobalt, molybdenum and other metal elements in stainless steel tableware. The method tested nearly 30 different batches of stainless steel tableware, and all the above twelve elements were detected.

The migration of metal elements in stainless steel tableware has a certain relationship with its content. The higher the content, the higher the migration of the metal. At the same time, the study also showed that the migration of metal elements in the stainless steel bowl gradually decreased with the increase of the number of uses.

New stainless steel bowls tend to migrate more metal than old stainless steel bowls.

3. What type of bowl is the safest?

Plastic and Imitation Porcelain Bowls

When unqualified plastic bowls or imitation porcelain bowls are used to hold hot soup, there is a risk of formaldehyde and other harmful organic substances moving out. If a steel ball is used to clean the bowl, the resulting micro-plastics can also be ingested by the human body.

Stainless Steel Bowls

Improper use is prone to risks such as the migration of harmful metal ions, so

Not suitable for holding acidic liquids such as vinegar or lemon juice for a long time.

Wooden and Bamboo Bowls

Bacteria and mold are prone to breed in a humid environment. Although some wooden bowls and bamboo bowls are coated with a layer of paint to prevent the growth of microorganisms, this layer of paint has the risk of falling off and being ingested by the human body. Therefore, it is best used to hold some relatively dry foods.

Glass and Ceramic Bowls

High chemical stability, and qualified tempered glass bowls and ceramic bowls have good heat resistance,

Foods can be served at any temperature, regardless of the risk of migration of harmful substances.

4. How to choose bowls of different materials?

Plastic and Imitation Porcelain Bowls

At present, most household "plastic bowls" or "imitation porcelain bowls" on the market are made of melamine resin. It is best to buy well-known brand melamine resin bowls in large shopping malls.

Don't buy "imitation porcelain bowls" that are much lower than market prices.

The merchants of regular imitation porcelain bowls generally mark the bowl with a description mark. According to the specific ingredients, it is divided into: A1, A3, A5, and A8. Be sure to choose A5 or A8, and the performance of high temperature resistance will be better.

Another type of plastic bowl is the popular wheat straw plastic bowl. When purchasing, you must pay attention to whether the material at the bottom of the bowl is marked with "wheat straw". Some bowls made of "starch" will also pretend to be wheat straw bowls.

Stainless Steel Bowl

When purchasing, check whether the label at the bottom of the bowl has the QS mark and the product quality certificate, etc. At the same time, pay attention to the content of chromium and nickel in the stainless steel. If the content of chromium is about 18% and the content of nickel is about 9%, you can buy with confidence!

Glass Bowl

According to different processes, it is divided into: ordinary glass bowl, tempered glass bowl and high borosilicate heat-resistant glass bowl, which can be distinguished by the logo at the bottom of the bowl.

Ordinary glass bowls have low strength, are easy to break, and are easy to burst during rapid cooling and heating.

The tempered glass bowl has good "fall resistance", and the general maximum working temperature does not exceed 300 ℃

The high borosilicate glass bowl has strong high-temperature resistance, and the working temperature can reach 450 ℃.

Ceramic Bowl

The chemical properties are stable, and there are generally no safety problems. You can buy with confidence.