About 4, 50,000 years ago molten rock the core of the earth forced its way to the surface and was broken through volcanoes. When the hot lava contained silica and cooled rapidly - it formed a glass as hard as a rock. The volcano glass is called obsidian. Thus nature herself created the first glass.
Thus, the process of producing glass is not a complex one. That can be done by using certain ordinary materials, which are easily available. According to the researches in this field, man was familiar with glass even before 5000 years. That is the Egyptians, more than 5000 years ago knew how to make a kind of colored glass with which they covered stone and pottery and sometimes made also beads. Perfumes and ointment bottles made of glass were used in Egypt more than 3500 years ago.
It was the time of the Roman Empire that the man learned how to form different types of objects with the help of glass. This period is considered to be one of the Golden moments in the evolution of glass industry. Later new inventions occurred and the machines replaced hands when the use of glass increased.
[...] The major event which paved the way for the growth of glass industry happened when the first automatic machine for blowing glasses was invented in 1903. This event replaced the old method of blowing glass with the help of free hands to the new technique in which machines are used for blowing and shaping glass. This machine can turn out more bottles in one hour than six men doing freehand blowing can do in a day. Few years later another machine was developed for automatically blowing light bulbs. [...]
[...] (during long storage of aquous solutions and particularly acidic food (fruit juices, pickles etc) small amount of alkali, silica or sulphur dioxide may extract from glass, but is quite harmless since this is even otherwise present in most of the food products.) Very strong Transparent Complicated shapes are possible Raw materials used in the Glass manufacturing industry Oxide %Wt function Batch plant The raw materials as per glass composition required are accurately weighed and mixed in the batch plant. The mixed batch along with the cullet is fed to the units in the furnace for melting. [...]
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