c. 3500 BCE
Beads & glazes
Near Eastern vitreous materials before true vessels.
Milestones in order. This is history, not a weekly activity grid.
- Beads & glazes
- Core-formed vessels
- Blowpipe
- Ravenscroft lead
- Owens bottle machine
- Pilkington float
- IGU sealed units
- Low-e coatings
- Tempered safety codes
- Fire-rated gel / ceramics
Darker cells mean a higher score for this topic on that metric.
Strength50
Heat resistance58
Fire performance88
Insulation28
Workability55
Circularity70
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Last reviewed Sources & creditsMedia creditsMethodology
Quick answers
Is Glass non-combustible?
Declared reaction class in this atlas: A1. Assemblies still need resistance tests.
Does Glass insulate?
Thermal mark 28/100 versus the atlas. Conductivity note: ~1 W/m·K.
What is the density band?
~2.5 g/cm³
How is it made?
Origin story: Mesopotamia / Egypt; float 1959 (Near East → St Helens).
Can it be recycled?
Circularity mark 70/100 — editorial, route-specific.
Typical melting or failure heat?
softens ~500–700 °C
heat 58 · fire 88
Glass did not arrive as a finished commodity. Mesopotamia / Egypt; float 1959 around Near East → St Helens still explains who makes it and which tests it sits in.
Ten dated points, five eras and three milestones below are the spine — not a complete industrial history.
Where it began
Mesopotamia / Egypt; float 1959Near East → St Helens
Timeline
c. 3500 BCEBeads & glazes
Near Eastern vitreous materials before true vessels.
c. 1500 BCECore-formed vessels
Egyptian and Mesopotamian luxury glass.
c. 50 BCEBlowpipe
Syro-Palestinian blowing scaled tableware.
1674Ravenscroft lead
English lead crystal.
1910sOwens bottle machine
Automatic bottles crashed cost.
1959Pilkington float
Tin bath made optical-quality sheet the default.
1970sIGU sealed units
Insulation became a gap, not the glass.
1980sLow-e coatings
Silver stacks reflect IR.
1990sTempered safety codes
Doors and façades mandated heat-treated glass.
2010sFire-rated gel / ceramics
Integrity glass is a different product than window glass.
The eras
c. 50 BCE
Blowpipe
Syro-Palestinian blowing scaled tableware.
1910s
Owens bottle machine
Automatic bottles crashed cost.
1970s
IGU sealed units
Insulation became a gap, not the glass.
1990s
Tempered safety codes
Doors and façades mandated heat-treated glass.
Milestones
Ravenscroft lead
1674English lead crystal.
IGU sealed units
1970sInsulation became a gap, not the glass.
Fire-rated gel / ceramics
2010sIntegrity glass is a different product than window glass.
Knowing this timeline is how to read a mill certificate without treating Glass as timeless.
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