Art Exam > Art Videos > Glassmaking technique: core-formed glass
Glassmaking technique core-formed glass Video Lecture - Art
Text Transcript from Video
(music)
Voiceover: The earliest glass
vessels are core formed.
Created by gathering molten
glass around a solid core.
To make the core a mixture
of dung, clay, sand and water
is kneaded together to the
consistency of bread dough.
This is formed in the shape of the
inside of the object to be made.
Then attached to one end of a metal rod.
(music)
After drying, the core is
given it's final shape by
trimming and filing.
Anklets of glass are melted in
a crucible within a furnace.
The core is coated with the molten glass.
Turning the rod ensures an even coating.
Decorative threads of
different colored glasses
are added by trailing.
After reheating the glass, the
threads are combed or raked.
with a pointed tool.
(music)
Pincers are used to form
the neck and the rim.
Suspension loops are made by
adding a small bit of glass
to the side of the vessel.
Then manipulating it
again with the pincers.
(music)
After completion of the glassworking,
the rod is removed by
giving it a sharp blow.
Once the vessel has been cooled slowly,
the core material can be scraped out,
leaving behind the vessel cavity.
(music)
Voiceover: The earliest glass
vessels are core formed.
Created by gathering molten
glass around a solid core.
To make the core a mixture
of dung, clay, sand and water
is kneaded together to the
consistency of bread dough.
This is formed in the shape of the
inside of the object to be made.
Then attached to one end of a metal rod.
(music)
After drying, the core is
given it's final shape by
trimming and filing.
Anklets of glass are melted in
a crucible within a furnace.
The core is coated with the molten glass.
Turning the rod ensures an even coating.
Decorative threads of
different colored glasses
are added by trailing.
After reheating the glass, the
threads are combed or raked.
with a pointed tool.
(music)
Pincers are used to form
the neck and the rim.
Suspension loops are made by
adding a small bit of glass
to the side of the vessel.
Then manipulating it
again with the pincers.
(music)
After completion of the glassworking,
the rod is removed by
giving it a sharp blow.
Once the vessel has been cooled slowly,
the core material can be scraped out,
leaving behind the vessel cavity.
(music)
About this Video
Apr 21, 2026 Last updated
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