High borosilicate glass VS Ordinary glass -What is borosilicate glass?

Many customers have asked this question: Why is there such a big difference in price between the two?

1. A customer asked: Why do the rims (or mouths) of cups and pots all have a small protruding bump?

This bump, in professional production terms, is called "bottle droplet", and in the language of the glass industry, it is called "bursting mouth". The node at the bursting mouth is a protrusion or small indentation similar to a glass bump, which is the finishing part of the handblown borosilicate glassware product after it is fully formed, after cutting off the excess glass solution. It is a characteristic of handcrafted heat resistant borosilicate glass. By this point, you can distinguish whether the purchased product is made by the handblowing process. At the same time, the closing part remaining at the mouth of the pot (cup) can also prevent the absolute adhesion of various lead-free borosilicate glass components. Because heat-resistant glass tea sets are often heated. If the components are absolutely adhered together after heating, the high pressure inside the pot cannot be released, and when the pressure difference between the inside and outside reaches a certain level, there is a high possibility of danger.

Someone else asked: When looking at the cup from the side, you can vaguely see some circular patterns. When you tap it, it doesn't feel like regular glass. Why is that?

Now I will explain to you what high borosilicate glass is and the common questions about it.

high borosilicate plate

2. First of all, we need to understand what a high borosilicate glass cup is.

High borosilicate glass (also known as hard glass or Borosilicate glass 3.3) is made by utilizing the property of glass conducting electricity at high temperatures. The glass is melted by heating inside the container and processed through advanced manufacturing techniques. Due to its linear thermal expansion coefficient of (3.3 ± 0.1) × 10-6/K, it is also referred to as "borosilicate glass 3.3". It is a special glass material with low expansion rate, high temperature resistance, high strength, high hardness, high light transmittance and high chemical stability. Due to its excellent performance, it is widely used in industries such as solar energy (as borosilicate glass for solar panel), chemical engineering (as chemical resistant borosilicate glass), pharmaceutical packaging, electric light sources, and craft accessories. Its excellent performance has been widely recognized by the world community, especially in the solar energy field, where it is more widely applied. Countries like Germany and the United States have carried out extensive promotion.

High borosilicate glass, as a more advanced glass material, is widely used in chemical medical equipment and in the production of high-end borosilicate kitchenware in Europe and America. Its texture is slightly different from that of traditional sodium calcium glass. For handmade custom borosilicate glassware, in order to achieve uniform shaping, the master needs to continuously rotate the glass embryo during the blowing process, creating striations. This is a normal process phenomenon specific to handmade glass products.

3. What are the advantages of high borosilicate glass cups?

The high borosilicate glass has a high expansion coefficient. In simple terms, if you take the glass cup out of the freezer and immediately fill it with freshly boiled hot water, the glass cup won't break. It can withstand temperatures ranging from minus twenty degrees to one hundred and thirty degrees above zero. Single-layer glass products can be directly placed in a microwave oven, and they can also be dry-burned on an open flame for 20 minutes without any problem. The main application of high borosilicate glass is in making glass products, microwave oven accessories, borosilicate solar tubes, chemical reactors, chemical reaction vessels, etc. It has a wide range of uses and is currently the safest drinking water product in the world.

The high boron heat-resistant glass has a first-class resistance to water and acid, and an A-class resistance to alkali. The harmful components in the glass are less than 0.1%. It is a widely used heat-resistant glass both at home and abroad. However, not all heat-resistant glasses are truly high-boron silicate glasses. Instead, other glasses are used as substitutes to reduce costs.

high borosilicate sheet and tubing

From this, it can be seen that high borosilicate glass cups are better than ordinary glass cups. With so many advantages, what about the price?

Of course, the cost of high borosilicate glass cups is higher than that of ordinary glass cups, so there is definitely a price difference.