How can you tell if a glass can hold water?

As long as the glass wall is not too thin, you can hold boiling water, and generally choose heat-resistant and thin-walled glasses to fill boiling water will not burst. Although the glass can be filled with hot water, it is not recommended to pour boiling water directly into it, as it may cause the glass to break.

Because the thermal conductivity of the glass is not very good, after pouring boiling water, the glass on the inner wall begins to expand, but the outer glass has not yet received heat, which leads to the pressure of the inner and outer glass is different, and the pressure on the outer glass increases instantly, exceeding the critical point.

At this point, the cup will explode.

Because the thermal conductivity of the glass is not particularly good, try to choose a glass with a thin wall when filling boiling water, which can reduce the heat transfer time, and the cup body can also be quickly heated and evenly expanded, and the cup will not burst. However, because the heat conduction time of the glass with a thick wall is not as fast as that of the thin one, it is easy to have a large difference in the pressure between the inner and outer walls of the glass after pouring boiling water, and the cup is also easy to crack.

Maintenance:

If you feel that it is too troublesome, you should wash it at least once a day, you can wash it at night before going to bed, and then let it dry. When cleaning the cup, not only the mouth of the cup should be cleaned, but also the bottom and wall of the cup should not be neglected, especially the bottom of the cup, which is not cleaned often, and may precipitate a lot of bacteria and impurities.

Drinking water can introduce harmful substances into the body, so be sure to wash off any lipstick left on the rim of the cup. A simple rinse with water when washing the cup is not enough, it is better to brush it with a brush.

In addition, due to dish soap.

The important ingredient is a chemical synthetic agent, which should be used with caution and rinsed with water. To clean a large amount of greasy, dirt or tea dirt.

You can squeeze toothpaste on the brush and rub it back and forth inside the cup. Since the toothpaste contains both a stain remover and a very fine friction agent, it is easy to wipe off the residue without damaging the cup.

Glasses are made of two types of materials: high-temperature resistant and non-high-temperature resistant. The temperature of the glass that is not resistant to high temperature is generally "-5 to 70 degrees Celsius", and if it is a high-temperature resistant glass made of high borosilicate material, then it can be used at a temperature of 400 to 500 degrees Celsius higher, and can withstand an instantaneous temperature difference of "-30 to 160 degrees Celsius".

As long as the wall of the cup is not too thin, you can hold boiling water, and if you are afraid of bursting, you can first insert a spoon in the cup, so that it will not explode because of the sudden pouring of boiling water.

As long as the glass is clean, it can hold water, and the glass is easy to crack due to the large temperature difference, and the glass will not decompose toxic substances because of boiling water!

Hehe, pour boiling water into it, it won't be violent.

Stick your hand in and you'll know.

The lampman's glass can be heated, but ordinary calcium glass cannot.

Lamp glass is borosilicate glass, also known as heat-resistant glass, which can be directly used for open flame heating. Features: The cup is thin (about 1mm thick), and the thickness of the cup wall is the same as that of the bottom of the cup. The common ones are tea sets, coffee cups, etc., and some are double-decker cups.

The wall thickness of the cup of ordinary calcium glass is generally about 2 mm, and the bottom of the cup is obviously thicker than the wall of the cup, so this kind of cup should not be used for open flame heating.

1. Use warm water to test the method, add half a cup of warm water, if the temperature rises quickly, it can basically withstand high temperature, if it is slow, it is easy to crack.

2. Observe the thickness of the glass, if the thickness is exceeded, it can withstand high temperature, and it can be felt by hand, if it is smooth but not rough, it can also be judged to be high temperature resistant.

3. The glass is divided into two materials: high-temperature resistant and non-high-temperature resistant. The temperature of the glass that is not resistant to high temperature is generally "-5 to 70 degrees Celsius", and if it is a high-temperature resistant glass made of high borosilicate material, then it can be used at a temperature of 400 to 500 degrees Celsius higher, and can withstand an instantaneous temperature difference of "-30 to 160 degrees Celsius".

It is very simple to distinguish whether the glass belongs to a heat-resistant material: the surface of the hot water in the high-temperature resistant glass is not hot, and the surface of the hot water in the glass is not hot.

Glasses are made of two types of materials: high-temperature resistant and non-high-temperature resistant. The temperature of the glass that is not resistant to high temperature is generally "-5 to 70 degrees Celsius", and if it is a high-temperature resistant glass made of high borosilicate material, then it can be used at a temperature of 400 to 500 degrees Celsius higher, and can withstand an instantaneous temperature difference of "-30 to 160 degrees Celsius".

The surface of the hot water in the high-temperature resistant glass is not hot, and the surface of the hot water in the glass is hot.

When a part of the inner wall of the glass is suddenly heated (or cold), the inner layer of the cup expands significantly when it is heated but the outer layer is not heated enough and expands less, so that the temperature difference between the parts of the glass is very large.

The main feature of high borosilicate glass is that it has a very low coefficient of thermal expansion, about one-third of that of ordinary glass, that is, it is not sensitive to temperature, and there is no common thermal expansion and contraction of ordinary objects, so it has high temperature resistance and high thermal stability. It can be used to hold hot water.

Do not use the tempered glass on the market as a high-temperature cup, the temperature of the tempered glass is the same as that of ordinary glasses, generally below 70 degrees, and you need to use it with caution.

If it is a heat-resistant glass, the cup will generally be labeled accordingly, indicating the use temperature, scope of use, etc.; If you find that the nominal heat-resistant glass is very low when purchasing, you should consider its authenticity.

Boiling water is poured into a glass and nothing is fine. The glass is specially treated to withstand high water temperatures, and boiling water is poured into it without bursting. It is best to stop boiling water for a while and then pour it into a glass, so that Hongying will be safer.

Glasses are one of the healthiest of all the cups, they do not contain chemicals, and even if they are poured into hot water, they will not have any adverse reactions and produce harmful substances.

Precautions. 1. Do not pour boiling water directly.

Although the glass can be filled with hot water, it is not recommended to pour hot water directly into it, as it will cause the glass to break. Because the thermal conductivity of the glass is not very good, after pouring boiling water, it will cause uneven heating inside and outside, resulting in outward pressure from the reed, and when the pressure of the glass is exceeded, the cup will explode. Accompany the auspicious.

You can add a little hot water first, then shake the cup to preheat the cup first, and then pour boiling water.

2. Choose a glass with a thin wall.

The thermal conductivity of the glass is not very good, choose a glass with a thin wall, which can reduce the time of heat transfer, and the cup body can be heated quickly and evenly. The heat conduction time of the glass with a thicker wall needs to be longer, and it is easy to crack after pouring boiling water.

3. Choose a glass with heat resistance.

Heat-resistant glasses can withstand extreme heat and cold changes, and are better for boiling water. <>

The glass can be filled with 100 degrees of boiling water, but it is not recommended to do so, because the thermal conductivity of the glass is not good, after pouring 100 degrees of boiling water, the glass on the inner wall will begin to expand, and the glass on the outer wall does not receive heat, so it will lead to the pressure of the inner and outer walls is different, and the pressure on the glass on the outer wall will increase instantly, and the cup is prone to burst.

The glass should be cleaned regularly to avoid dirt and dirt in the cup, which will affect your health after long-term drinking.

It is recommended to clean the newly bought or long-term unused glass with warm water before filling it with water to avoid accidentally ingesting bacteria and dust.

Glass refers to a cup made of glass, usually made of high borosilicate glass, which is fired at a high temperature of more than 600 degrees.