--- title: Float Glass Process | Vitro Architectural Glass description: Learn how float glass is made, from raw materials and molten tin to cooling, cutting and final glass fabrication. image: https://glassed.vitroglazings.com/hubfs/Glass%20Education%20Center%202021/Float-Glass-Process_60.jpg --- [![Vitro Architectural Glass](https://www.vitroglazings.com/assets/images/vitro_logo_color.svg)](https://www.vitroglazings.com/) - [Products](https://www.vitroglazings.com/products/) - - [Low-e Glass](https://www.vitroglazings.com/products/low-e-glass/) - [*Solarban*® 60 Glass](https://www.vitroglazings.com/products/low-e-glass/solarban-60-glass/) - [*Solarban*® 60 *Optiblue*® Glass](https://www.vitroglazings.com/products/low-e-glass/solarban-60-optiblue-glass/) - [*Solarban*® 65 Glass](https://www.vitroglazings.com/products/low-e-glass/solarban-65-glass/) - [*Solarban*® 70 Glass](https://www.vitroglazings.com/products/low-e-glass/solarban-70-glass/) - [*Solarban*® 70 *Optiblue*® Glass](https://www.vitroglazings.com/products/low-e-glass/solarban-70-optiblue-glass/) - 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[Education](https://www.vitroglazings.com/education/) - [Glass Education Center](https://glassed.vitroglazings.com/) [![](https://glassed.vitroglazings.com/hubfs/Glass%20Education%20Center/blog%20feature%20images/transparent_spacer_1150x600.png)](https://glassed.vitroglazings.com/float-glass-process) ###### [ARTICLE](https://glassed.vitroglazings.com/float-glass-process) & [Infographic](https://glassed.vitroglazings.com/topics/tag/infographic) # Float Glass Process 1 minute read ## What You'll Learn: - Float Glass is Made by Floating Molten Glass on Molten Tin - Glass Starts with Raw Materials Mixed and Melted Together - Glass is Carefully Cooled and Inspected - Finished Glass is Cut and Prepared for Further Processing The Float Glass Process is a multi-step glass manufacturing process where liquid glass is formed by "floating" it on molten metal.  First, raw materials are weighed, mixed and moved by conveyor from the initial batch house into the furnace. Water is added to help mix the batch and minimize airborne dust.   Inside the furnace, the raw materials become molten at temperatures reaching 2,900 degrees Fahrenheit. The molten glass is refined by homogenizing the material and removing bubbles.   In order to reach the acceptable viscosity for the following float bath in tin, the glass is cooled to approximately 2,000 degrees Fahrenheit.  After the molten tin bath, the rigid glass ribbon goes through the cooling tunnel, or lehr. This process lowers the glass temperature from around 1,000 degrees Fahrenheit to cool to room temperature.  Now on the main conveyor line, the continuous glass ribbon is electronically inspected and cut to the appropriate size.  Finally, the glass is packed and loaded for off-line coating, heat-treating or shipment.   For more information on how glass is made, read [How Glass is Made – From Cutting to Low-e Coatings](https://glassed.vitroglazings.com/topics/how-glass-is-made-from-cutting-to-low-e-coatings). For any other glass questions, please contact Vitro Glass or call 1-855-VTRO-GLS (1-855-887-6457).  [![infographic of float glass manufacturing process](https://glassed.vitroglazings.com/hs-fs/hubfs/FLOAT%20GLASS%20PROCESS_Revised.png?width=611&height=466&name=FLOAT%20GLASS%20PROCESS_Revised.png)](https://glassed.vitroglazings.com/hubfs/FLOAT%20GLASS%20PROCESS_Revised.png)   **Topics:** [Glass Fabrication](https://glassed.vitroglazings.com/tag/glass-fabrication), [Infographic](https://glassed.vitroglazings.com/tag/infographic), [Making Glass](https://glassed.vitroglazings.com/tag/making-glass), [Understanding Performance](https://glassed.vitroglazings.com/tag/understanding-performance) Updated on August 20, 2026 This is a search field with an auto-suggest feature attached. - There are no suggestions because the search field is empty. ### Topics - [Making Glass](https://glassed.vitroglazings.com/tag/making-glass) - [Specifying Glass](https://glassed.vitroglazings.com/tag/specifying-glass) - [Science of Glass](https://glassed.vitroglazings.com/tag/science-of-glass) - [All Topics](https://glassed.vitroglazings.com/) - [Bird-Friendly Glass](https://glassed.vitroglazings.com/tag/bird-friendly-glass) - [Environment & Ecology](https://glassed.vitroglazings.com/tag/environment-ecology) - [Glass Color & Aesthetics](https://glassed.vitroglazings.com/tag/glass-color-aesthetics) - [Glass Fabrication](https://glassed.vitroglazings.com/tag/glass-fabrication) - [Glass Installation](https://glassed.vitroglazings.com/tag/glass-installation) - [Insulating Glass Units](https://glassed.vitroglazings.com/tag/insulating-glass-units) - [Low-E Glass](https://glassed.vitroglazings.com/tag/low-e-glass) - [Low-Iron Glass](https://glassed.vitroglazings.com/tag/low-iron-glass) - [Understanding Performance](https://glassed.vitroglazings.com/tag/understanding-performance) - [Glossary](https://glassed.vitroglazings.com/glossary) - [FAQs](https://glassed.vitroglazings.com/faqs) ### Subscribe to our newsletter ### Word of the Month #### ANSI American National Standards Institute. 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