Does boiling water in a glass fry? I m afraid I ll cut myself

There are many kinds of glass, if it is ordinary glass, such as the kind of glass cans for desserts and drinks, or fruits, it is neither resistant to high temperature nor low temperature, and it will crack when it is filled with hot water or put in the refrigerator. But if it's a microwave.

The special kind of glass bowl can generally withstand the temperature range of minus 20 ° to 400 °, so it will not be fried with hot water, but the temperature cannot drop or rise suddenly, such as taking it out of the freezer compartment and heating it violently, it may also crack. Therefore, it is best to read the manual before using glass products, and whether the temperature range of use is marked on it. Generally speaking, the glasses sold in the market will not be fried with boiling water, but it is best not to put them in the microwave oven to heat them.

The glass bursts, mainly due to uneven heating inside and outside, and it will not be the best way, and it usually does not hurt people.

This is not necessarily, if it is an ordinary glass, when it encounters hot water, because of uneven thermal expansion and contraction, it will cause the glass to crack and damage, at most, it is not so exaggerated that it bursts.

However, nowadays, the glasses that hold water are pre-treated, and pouring boiling water directly will not cause the glass to crack, so it is recommended to buy a glass with high temperature resistance.

This depends on the quality of your glass, if it is a better glass specially used for drinking water, it should not happen as you said, but if it is an ordinary glass, it is still very likely to crack, so be careful.

If the water is hot, the glass will **. So, don't use a glass to fill boiling water.

If it is specially used for drinking water, it should be high-temperature resistant glass, and it will not fry when it is filled with boiling water.

There is a danger of **.

When a part of the inner wall of the glass is suddenly heated (or cold), the inner layer of the cup is heated and expands obviously, but the outer layer is not heated enough and expands less, so that the temperature difference between the parts of the glass is larger, and due to the reason of the thermal expansion and contraction of the object, the thermal expansion of each part of the glass is uneven, and when the uneven difference is too large, the glass may be broken.

If you're afraid of a glass**, try putting an iron spoon in the cup. When boiling water is poured into the bottom of the glass, before it has time to heat the glass (a bad conductor of heat), the boiling water will distribute a part of the heat to the metal spoon of the good conductor, so the temperature of the boiling water decreases, and it changes from boiling water to hot water, which does not interfere with the glass. And be careful not to pour hot water immediately when using it in winter, you can use a small amount of water to warm the cup before using it to prevent the temperature difference from bursting.

Structurally classified.

The glass is divided into double-layer glass and single-layer glass, its production process is different, the double-layer is mainly adapted to the needs of the advertising cup, the company's logo can be printed on the inner layer, used for gifts or gifts, etc., and the thermal insulation effect is more outstanding.

Classification of materials and applications.

Crystal glasses, glass office glasses, glass spout glasses, tailed glasses, tailless glasses. The tail cup is not as good as the vacuum cup, and the heat preservation time is short. The tailless cup is the vacuum cup holding time.

Boiling water in a glass can happen under certain conditions**. This is because of the effect of the principle of thermal expansion and contraction, when hot water is poured into the cold glass, the glass will be subject to sudden temperature changes, resulting in different degrees of thermal expansion and contraction inside and outside the glass, and this thermal expansion and contraction may cause the glass to crack or **. In order to avoid this from happening, it is recommended to use a heat-resistant glass or a special glass when pouring boiling water, and you can first pour hot water into a container that can easily withstand high temperatures, wait for a while before pouring into a wax glass to alleviate the suddenness of the temperature change.

Alternatively, you can choose to use a container made of other materials, such as a ceramic cup or stainless steel cup, to hold boiling water.

Generally, glass bottles are resistant to high temperatures and will not burst during normal use, but when glass products are filled with boiling water in a low temperature environment, they are easy to burst. Because glass is a bad conductor of heat, when boiling water enters the glass bottle, it will quickly heat up inside, and then expand, causing the glass bottle to burst, and the chance of the thick glass bottle bursting is even greater.

Nowadays, glass products are getting thinner and thinner, although they are slowly popular, but thin-walled glass bottles are not used, because daily bumps are inevitable, and the thin-walled glass is estimated to be broken when touched. Thick-walled glassware is more resistant to collisions, but it is not very resistant to temperature changes and can easily burst.

The emergence of double-layer glass is a good solution to this problem, its raw material is high borosilicate glass, is a new type of environmentally friendly teacup, has been loved by people. The double-walled glass is that the glass is divided into two layers during manufacturing, which can play a good role in heat insulation and anti-scalding.

The double-walled glass cup is the best tea set for drinking water and making tea now, it is not only highly transparent, wear-resistant, but also easy to clean, and safe and environmentally friendly. Not only does it keep the temperature of the tea, but it doesn't burn your hands when you pick it up. It is very adaptable to changes in temperature and is not easy to burst.

The double-walled glass is a food-grade catering glass, which is fired at a high temperature of more than 600 degrees, and is deeply loved by everyone as a new member of the cup.

1 Boil the glass If you want to prevent the new glass from breaking, you can put the newly bought glass in water and boil it for 10 minutes, after the glass is evenly heated, it will not generate strong pressure and will not cause the cup to break. Or you can also put a little hot water to wash the glass before filling it with boiling water, and then pour the hot water so that it will not burst.

2 Put a spoon When pouring boiling water, you can put an iron spoon or a small stainless steel spoon in the cup, and then slowly pour the boiling water into the cup. So that the cup doesn't burst. This is because when boiling water is poured into the bottom of the glass, before it has time to heat the glass (a bad conductor of heat), the boiling water will distribute a part of the heat to the metal spoon of the good conductor, so the temperature of the boiling water decreases, and it changes from boiling water to hot water, which does not interfere with the glass.

As for the boiling water that continues to be poured in, it is not so terrible for the cup, because the cup has already had time to be slightly hot.

3 Avoid using excessive temperature difference Glassware is easy to burst when it is filled with excessively hot or cold water, so avoid using an environment with excessive temperature difference. Usually a temperature difference of more than 80 degrees can cause strong thermal expansion and contraction of the utensils.

It is easy to cause explosions. Unless otherwise specified, try to avoid using utensils with excessively hot or cold water. Before pouring hot water, you can pour a small amount of water, and shake the utensils to make full contact with the hot water to achieve the purpose of preheating the utensils, and then pour hot water to prevent the utensils from bursting due to excessive temperature differences.

Under normal circumstances, the glass will not be fried when it is poured with boiling water, generally when the temperature is relatively low in winter, the glass is more likely to burst when the glass is thicker. Boiling water is poured into the glass, and the walls of the thick glass are relatively thick, and the heat transfer is very slow, and then the heat shields the swelling and contraction of the shirt, causing the glass to burst.

The glass is not only transparent and beautiful, it is the healthiest quilt of all materials. During the firing process, it does not contain any organic chemicals, and it is used to hold water or other beverages without worrying about chemicals entering the stomach. Moreover, the surface of the glass is smooth and transparent, and it is difficult for dirt and bacteria to grow on the wall of the cup.

Features of the glass:

1. Atmospheric appearance: The appearance of the glass looks beautiful and practical.

2. Firm and stable: The bottom of the glass is generally fired by hand, which is relatively stable and firm.

3. Good material: The glasses are made of food-grade glass, which has good permeability and is safe to use.

4. Good production process: the glass is fired back to the furnace after molding, and after a high temperature of 600 degrees, it will not be broken because the ambient temperature changes too much.

Glass is often in contact with people in their daily life, we must pay attention to distinguish when purchasing, do not buy fake and shoddy products, inferior glass will not only contain harmful substances to the human body, but also not durable, and it is easy to break at high temperatures.

Yes, the inner wall of the glass expands due to heat, causing the cup to burst. The problem is not in the quality of the cup, but because the glass is a poor conductor of heat, used in a low temperature environment in winter, after pouring hot boiled water into the glass, the inner wall of the glass expands by heat, and its outer wall cannot keep up with the expansion rate of the inner wall due to slow heat transfer, and the uneven heating causes the cup to burst.

The General Administration of Quality Supervision, Inspection and Quarantine (AQSIQ) issued an early warning for the consumption of glass water utensils, pointing out that in recent years, there have been frequent injury accidents caused by the change of glass water to waiters, reminding everyone to choose the wrong glass or improper usage when drinking hot water, which is likely to cause the cup to burst, resulting in burns and scratches.

Pour a little hot water into the glass first, and rotate the hot water along the entire cup wall, which can play a buffering role in the thermal expansion and contraction of the cup and prevent the cup from bursting when it is hot. The newly bought glass can be wiped with a hot towel before use, so that the temperature of the outer wall of the glass rises, and then pour hot water without fear of bursting. Boil the glass in salted water, about 20 minutes, then pour in hot water so that the glass does not break.

1. Pour a little hot water into the glass first, and rotate the hot water along the entire cup wall, which can play a buffering role in the thermal expansion and contraction of the cup and prevent the cup from bursting when it is hot.

2. The newly bought glass cup can be wiped with a hot towel before use, so that the temperature of the outer wall of the glass rises, and then pour hot water into it without fear of bursting.

3. Boil the glass in salted water for about 20 minutes, then pour in hot water, and the glass will not break.