What Is The Difference Between Blown Glass And Pressed Glass?

The production of glass is generally divided into blown glass and pressed glass. But it is not necessarily a blown glass if it is made by hand, and it must be a pressed glass if it is made by a machine. Today we will take a good look at the difference between blown glass and pressed glass.

There are two types of blown glass: hand blown and machine blown. When blowing glass by hand, since the melted glass flows slowly and the air is difficult to pass through the glass, it is easy to stay in the glass and form bubbles. In the opinion of the public, this may be a shortcoming of hand blowing, but more people still prefer to think that this is a kind of life texture of glass, endowing it with various meanings, supplemented by carvings (such as pure glass imported from Italy) Hand-blown glass mermaid tears series, at this time the bubbles on the glass are no longer bubbles, you can say they are the bubbles spit out by the fish in the sea, or the tears left by the mermaid...) machine-blown glass Compared with pure hand-blown glass, the cup is naturally more precise and perfect. Whether it is cutting glass liquid or blowing air, the steps are completely changed from manual to machine operation. But in the editor's opinion, this kind of perfection is actually a kind of imperfection. It lacks many possibilities of handmade products, and its plasticity is not so strong.

Pressed glass is also divided into two types: manual pressing and machine pressing. Unlike blown glass, which has air bubbles, when pressing glass, the punch is used to force the molten glass to form in the mold. This pressure is far greater than the blowing air pressure during glass blowing. The air blowing air pressure cannot completely discharge the air from the gap of the glass liquid, but the punching can be done easily, so the glass is pressed Small air bubbles are not always present as easily as in blown glass. Another difference between blown glass and pressed glass is that there are countless halos in the pressed glass. That's the mold pressed halo, the blown ones don't.