How Is Glass Made? - Glass is made from a mixture of sand, lime and soda. When these ingredients are heated together, they form a liquid glass. This liquid glass is made into sheets by cooling and flattening. To make objects like vases, craftsmen blow into a glob of liquid glass with the help of a long tube. For more information watch this video to learn how is glass made, the processes and method involved. http://mocomi.com/how-is-glass-made/

1. Chemistry for Kids
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How Is Glass Made?
Glass is made from a mixture of sand, lime
and soda. When these ingredients are
heated together, they form a liquid glass.
This liquid glass is made into sheets by
cooling and flattening. To make objects like
vases, craftsmen blow into a blob of liquid
glass with the help of a long tube.
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2. How Is Glass Made?
PLATE GLASS MADE BY ROLLING
Sand, lime and soda are heated together
in a furnace to make liquid glass. Rollers are
used to flatten glass into sheets, which are
first cooled then cut.
Sand
Lime
Soda
Shaping rollers
Cutter
Furnance
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Plate

3. How Is Glass Made?
Sand
Lime
Soda
Gas to control
atmosphere
Heater
Furnance
Molten Metal
Cooling
and
cutting
PLATE GLASS MADE BY FLOATING
Liquid glass from a furnace is floated and
slowly cooled on the surface of liquid tin.
After the glass has cooled down, it is cut
into pieces.
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4. How Is Glass Made?
HANDMADE GLASSWARE
Vases, ornaments and other intricate glass objects are made
by a glass-blower. The glassblower uses a metal blowpipe
which has a blob of hot glass at
the end of it. A glass blower
then blows the soft glass into
shape with his hands.
GLASS HAS MANY USES
Glasses, window panes, mirrors are few of the
many things that are made from glass. Glass is not
only useful, but can look beautiful too. Windows
made of stained glass are works of art.
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5. How Is Glass Made?
ADDITIONAL INFORMATION
Other glass-making ingredients can include
alumina, lead oxide, salt peter and zinc oxide
which are used to make different types of
glass. In the production of plate glass, waste
glass from a previous melt is also added, making
up 5 to 40 percent of the mixture. Melting
takes place in giant furnaces from where
molten glass is floated or rolled into sheets.
Rolling
Process
Sand
+Lime
+Soda
Cooling
Cutting
Final
Product
Waste
Product
Floating
Process
Alumina/Lead oxide/Salt peter/Zinc oxide
Cooling
Cutting
Final Product
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6. How Is Glass Made?
Cooling chamber
PROJECT
Identify different glass objects in your house and
notice how each one looks and feels different.
Try making a visit to a glass factory or inquire
about a glass-blower and see how they give shape
to objects.
Try looking through different glass objects. What
do you see?
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