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Can the glass I just bought be boiled with hot water? What are the points of attention when cooking?
Usually when we buy a glass, we will consider which aspect of the future use is biased. Generally, glasscookware，there are two kinds of glass materials on the market, one is glass that is not resistant to high temperature, and the other is glass that is not resistant to high temperature. Cup, I heard someone say that the thermos cup that I just bought should be boiled in boiling water for a few minutes, and then taken out for cooling, which not only makes the thermos cup harder, but also more durable, but this has No effect? What's the point of cooking? Let's follow the editor to find out.
In fact, if you buy a glass that is not resistant to high temperature, you cannot boil it with boiling water, because the temperature of the thermos is generally between -5 degrees and 70 degrees Celsius, so the water temperature is too high, which is not conducive to cooking in the cup.
. If the high temperature glass can be boiled in water. Secondly, the function of boiling the glass is only to sterilize. In order to sterilize it, it is not necessary to be so troublesome, just put the glass in the water and soak it.
thermos cup
So, how do we distinguish whether the material of the glass is heat-resistant or not? In fact, it is very simple. The surface of the hot water in the high-temperature glass is not hot, and the surface of the hot water in the non-high-temperature glass is hot. What are the characteristics of the glass cups of these two materials?
The glass of ordinary material is a poor conductor of heat. At the moment when boiling water is poured, all parts of the inner wall of the glass are heated unevenly, resulting in different degrees of thermal expansion and contraction, resulting in uneven thermal expansion, and the glass may burst. Therefore, before pouring boiling water, it is better to add some cold water first, then add hot water, and then pour out the water after the cup is warm, and then add boiling water, so there is no problem.
The material used in the high temperature resistant glass is high borosilicate glass. Its biggest feature is that it has a very low thermal expansion coefficient, which is about one-third of that of ordinary glass, that is, it is not sensitive to temperature, and does not have the thermal expansion and cold common in general objects. Therefore, it has high temperature resistance and high thermal stability. Can be used to hold hot water.
In fact, if you buy a glass that is not resistant to high temperature, you cannot boil it with boiling water, because the temperature of the thermos is generally between -5 degrees and 70 degrees Celsius, so the water temperature is too high, which is not conducive to cooking in the cup.
. If the high temperature glass can be boiled in water. Secondly, the function of boiling the glass is only to sterilize. In order to sterilize it, it is not necessary to be so troublesome, just put the glass in the water and soak it.
thermos cup
So, how do we distinguish whether the material of the glass is heat-resistant or not? In fact, it is very simple. The surface of the hot water in the high-temperature glass is not hot, and the surface of the hot water in the non-high-temperature glass is hot. What are the characteristics of the glass cups of these two materials?
The glass of ordinary material is a poor conductor of heat. At the moment when boiling water is poured, all parts of the inner wall of the glass are heated unevenly, resulting in different degrees of thermal expansion and contraction, resulting in uneven thermal expansion, and the glass may burst. Therefore, before pouring boiling water, it is better to add some cold water first, then add hot water, and then pour out the water after the cup is warm, and then add boiling water, so there is no problem.
The material used in the high temperature resistant glass is high borosilicate glass. Its biggest feature is that it has a very low thermal expansion coefficient, which is about one-third of that of ordinary glass, that is, it is not sensitive to temperature, and does not have the thermal expansion and cold common in general objects. Therefore, it has high temperature resistance and high thermal stability. Can be used to hold hot water.
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