How to distinguish glass materials

   Glass cups can usually be divided into ordinary soda-lime glass, tempered glass, and high borosilicate heat-resistant glass, but these three types of glass are difficult to distinguish from the appearance. Usually lay people look busy, insiders look at the doorway, as the general public friends who buy glass, in the short and heat-resistant glass is artificially melted, the time to buy a glass, the time to accurately determine the glass The material is very difficult. So how to verify if the glass is high borosilicate heat resistant glass?

     High borosilicate heat-resistant glass can withstand an instantaneous temperature difference of about 150 ° C, and can be used for both hot and cold drinks. The main processes are manual blowing and semi-automatic assembly lines, and special pressing. Ordinary glass can withstand an instantaneous temperature difference of 75 ° C. It is recommended to drink cold drinks and plain water. Mainly pressing process and iron pipe blowing process. Tempered glass is not recommended for liquids.

                     The artificially blown high-borosilicate glass cups are mainly made of high-borosilicate glass tubes, which are softened at high temperature, and then placed in a mold for rotary blow molding or fixed blow molding. Glass manufacturers tell everyone. Blown products are generally thin. General high-borosilicate glass tea and coffee utensils have a thickness of about 1.2-1.8 mm, and pots have a thickness of about 1.8-2.2mm. Occasionally, there are cups or pots that are straight, which is because the raw materials are not blown, so they can reach a thickness of 2-4mm.

The double-layer glass is definitely a cup made of high borosilicate heat-resistant glass. The glass cup with handle is thin and light, and it must be high borosilicate glass with a thickness of less than 2mm. Glass manufacturers tell everyone. If it is heavy, then it depends on whether there is a mold mark on the handle part. If it is, it is not heat-resistant glass (except in rare cases). If not, it is heat-resistant glass. The hands are glued up. If you look carefully at the connection between the handle and the cup, you will definitely see that they are different, not symmetrical, and not perfect. Generally, a straight cup with a thick bottom must be pressed, because it is artificially made to thicken the bottom to 2 centimeters, which is astronomical, and the thickness will not be the same. It is ugly and worth the money.

             In addition to the above methods, the following methods can also be used for rapid identification. 1. You can put the cup in the refrigerator, refrigerate for 24 hours, and take out 100 degrees of hot water. If it is cracked, it is definitely not high borosilicate glass. 

2. The high borosilicate glass cup has better transparency, more delicate cup body and smoother feel. High temperature resistance, resistance to sudden and sudden heat, is the biggest feature of high borosilicate glass products. 

3. Glass is a glass whose raw material is glass. Usually the raw material is high borosilicate glass, which is fired at a high temperature of more than 600 degrees. It is a new type of environmentally friendly tea cup, which is more and more popular.