Plate glass
Contents |
[edit] Introduction
Glass is a material made from liquid sand. It is an amorphous (non-crystalline) solid that displays a glass transition near its melting point which is around 1,700°C (3,090°F). This means that materials transform from a hard and brittle state into a molten state, or vice versa depending on whether the glass transition temperature is the melting or solidifying point. An amorphous solid has some of the crystalline order of a solid and some of the random molecular structure of a liquid.
There are many types of glass, each with different chemical and physical properties dependent upon their application.
For more information see: Glass.
[edit] History of plate glass
Plate glass is a type of glass that was first produced in plane form. The earliest successful version of plate glass was manufactured in France in the 17th century. It was an improvement over the cylinder glass or broad glass method, which required the glass maker to swing a bubble of molten glass back and forth whilst blowing, producing an elongated balloon that could be formed into the shape of a cylinder and then flattened into a sheet.
For more information, see Cylinder glass
The advance plate glass process was introduced by Louis Lucas de Nehou and Abraham Thevart. It involved casting the molten material onto a metal table and then grinding and polishing the glass by hand.
For more information, see Cast plate
This technique was automated in the 1800s when a steam engine took over the grinding and polishing process. The process improved again in the early 1900s, when machines were designed to incorporate methods including the Fourcault process, the Bicheroux process and others. Using these methods, plate glass could be manufactured in various weights and thicknesses. It was colourless and had good transparency, which is why it was once commonly used for large picture windows and glass doors.
[edit] Imperfections and distortions
While it was produced with a smooth finish, plate glass was not always entirely flat or parallel. This sometimes produced a slight distortion effect. Once float glass was introduced in the 1950s, plate glass became less popular.
Float glass created large, thin, flat panels from molten glass that were then floated onto a pool of molten metal such as tin. This process produced a very smooth sheet of glass with a highly consistent thickness.
For more information see: Float glass.
[edit] Related articles on Designing Buildings Wiki
Featured articles and news
Retrofit 25 – What's Stopping Us?
Exhibition Opens at The Building Centre.
Types of work to existing buildings
A simple circular economy wiki breakdown with further links.
A threat to the creativity that makes London special.
How can digital twins boost profitability within construction?
The smart construction dashboard, as-built data and site changes forming an accurate digital twin.
Unlocking surplus public defence land and more to speed up the delivery of housing.
The Planning and Infrastructure Bill
An outline of the bill with a mix of reactions on potential impacts from IHBC, CIEEM, CIC, ACE and EIC.
Farnborough College Unveils its Half-house for Sustainable Construction Training.
Spring Statement 2025 with reactions from industry
Confirming previously announced funding, and welfare changes amid adjusted growth forecast.
Scottish Government responds to Grenfell report
As fund for unsafe cladding assessments is launched.
CLC and BSR process map for HRB approvals
One of the initial outputs of their weekly BSR meetings.
Architects Academy at an insulation manufacturing facility
Programme of technical engagement for aspiring designers.
Building Safety Levy technical consultation response
Details of the planned levy now due in 2026.
Great British Energy install solar on school and NHS sites
200 schools and 200 NHS sites to get solar systems, as first project of the newly formed government initiative.
600 million for 60,000 more skilled construction workers
Announced by Treasury ahead of the Spring Statement.
The restoration of the novelist’s birthplace in Eastwood.
Life Critical Fire Safety External Wall System LCFS EWS
Breaking down what is meant by this now often used term.
PAC report on the Remediation of Dangerous Cladding
Recommendations on workforce, transparency, support, insurance, funding, fraud and mismanagement.
New towns, expanded settlements and housing delivery
Modular inquiry asks if new towns and expanded settlements are an effective means of delivering housing.