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	Glass is a former featured article. Please see the links under Article milestones below for its original nomination page (for older articles, check the nomination archive) and why it was removed.
	Glass has been listed as one of the Natural sciences good articles under the good article criteria. If you can improve it further, please do so. If it no longer meets these criteria, you can reassess it.
	This article appeared on Wikipedia's Main Page as Today's featured article on September 17, 2004.
Article milestones Date Process Result May 3, 2004 Featured article review Kept July 21, 2004 Featured article candidate Promoted April 17, 2006 Featured article review Demoted July 28, 2006 Good article nominee Not listed October 27, 2007 Good article nominee Not listed October 15, 2017 Good article nominee Not listed November 10, 2019 Good article nominee Not listed March 9, 2020 Good article nominee Listed A fact from this article appeared on Wikipedia's Main Page in the "Did you know?" column on March 22, 2020. The text of the entry was: Did you know ... that glass (example pictured) can form naturally from supercooled volcanic magma? Current status: Former featured article, current good article

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Physics: Glass Top‑importance This article is within the scope of WikiProject Physics, a collaborative effort to improve the coverage of Physics on Wikipedia. If you would like to participate, please visit the project page, where you can join the discussion and see a list of open tasks.PhysicsWikipedia:WikiProject PhysicsTemplate:WikiProject Physicsphysics Top This article has been rated as Top-importance on the project's importance scale. This article is supported by Glass Taskforce. Craft Top‑importance This article is within the scope of WikiProject Craft, a collaborative effort to improve the coverage of craft on Wikipedia. If you would like to participate, please visit the project page, where you can join the discussion and see a list of open tasks.CraftWikipedia:WikiProject CraftTemplate:WikiProject CraftCraft Top This article has been rated as Top-importance on the importance scale. Materials Top‑importance This article is within the scope of WikiProject Materials, a collaborative effort to improve the coverage of Materials on Wikipedia. If you would like to participate, please visit the project page, where you can join the discussion and see a list of open tasks.MaterialsWikipedia:WikiProject MaterialsTemplate:WikiProject MaterialsMaterials Top This article has been rated as Top-importance on the importance scale. Technology This article is within the scope of WikiProject Technology, a collaborative effort to improve the coverage of technology on Wikipedia. If you would like to participate, please visit the project page, where you can join the discussion and see a list of open tasks.TechnologyWikipedia:WikiProject TechnologyTemplate:WikiProject TechnologyTechnology Visual arts This article is within the scope of WikiProject Visual arts, a collaborative effort to improve the coverage of visual arts on Wikipedia. If you would like to participate, please visit the project page, where you can join the discussion and see a list of open tasks.Visual artsWikipedia:WikiProject Visual artsTemplate:WikiProject Visual artsvisual arts

This article is substantially duplicated in one or more external publications. Since these publication(s) copied Wikipedia, rather than the reverse, please do not flag this article as a copyright violation of the following source: Surhome, L. M., Timpledon, M. T., & Marseken, S. F. (2010), Viscosity of amorphous materials: Amorphous solid, molar gas constant, arrhenius equation, glassy state, glass transition temperature, Betascript{{citation}}: CS1 maint: multiple names: authors list (link) Additional comments OCLC 682564128, ISBN 9786130456511.

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in the image of the amorphous structure of SO2, it says the red atoms are silicon and the blue ones oxygen. It’s the other way around. One silicon atom is bonded to two oxygens it shares with another silicon atom. Geefkip (talk) 18:41, 11 January 2025 (UTC)[reply]

It’s also common to adress oxygen with red and that’s what stood out to me first Geefkip (talk) 18:42, 11 January 2025 (UTC)[reply]

• The figure and description is correct. There are 4 oxygen atoms bonded to each silicon - although as this is a pseudo 2D representation only 3 are visible. Polyamorph (talk) 20:04, 11 January 2025 (UTC)[reply]

"Glass packaging is sustainable, readily recycled, reusable and refillable."

I have doubts about sustainability of glass packaging, especially since this claim comes from FEVE ("FEVE is the Federation of European manufacturers of glass containers for food and beverage and flacons for perfumery, cosmetics and pharmacy markets.") so I assume they are biased.

Glass has a high melting point and glass recycling is an energy intensive process. Especially single-use glass, which is still found a lot for example in beer bottles, is not sustainable. In practice, even glass containers that can theoretically be reused are not commonly reused and instead discarded into recycling, even in deposit systems in Europe. For example in Romania, a deposit on glass containers was introduced but the machines at the supermarket crush the bottles.

We are facing an ecological catastrophe and I think calling glass sustainable without putting data next to it is misleading at best. 212.95.5.63 (talk) 14:13, 20 March 2025 (UTC)[reply]

For a better source than FEVE, see the BBC's article instead: https://www.bbc.co.uk/bitesize/articles/zc46m39#zhssn9q

Unfortunately, I cannot edit the page myself because it is protected. 213.142.96.25 (talk) 01:06, 4 April 2025 (UTC)[reply]

The redirect Vitreous Materials has been listed at redirects for discussion to determine whether its use and function meets the redirect guidelines. Readers of this page are welcome to comment on this redirect at Wikipedia:Redirects for discussion/Log/2025 October 8 § vitreous materials until a consensus is reached. consarn _{(talck) (contirbuton s)} 16:19, 8 October 2025 (UTC)[reply]

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{{subst:trim|1=

  Glass is not a solid but a fluid.  It flows at the rate of one centimeter per century.  Just because it flows at what seems to be a very slow rate does not change it to a solid.  You should have noticed by now that when you look at a window pane that has been in place for, say more than 20 years, it looks warped or deformed.  Same with or similar to looking at a very old mirror.[1]

 Not done: please provide reliable sources that support the change you want made. Unfortunately something you remember you were taught in high school is not considered a reliable source.ScrubbedFalcon (talk) 13:44, 28 February 2026 (UTC)[reply]

See also the section Glass#Reputed_flow where this misconception is addressed. Polyamorph (talk) 18:02, 28 February 2026 (UTC)[reply]

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Under the 'History' tab, in line 'The Romans perfected cameo glass, produced by etching and carving through fused layers of different colours to produce a design in relief on the glass object' change the link for etching from etching (microfabrication), which erroenously refers to the process used in modern microchip fabrication, to Etching (https://en.wikipedia.org/wiki/Etching), which refers to actual etching of glass/metal as referred to in the article TankerManager (talk) 21:20, 8 March 2026 (UTC)[reply]

 Done, linked to Glass etching. Tbhotch^™ (CC BY-SA 4.0) 21:27, 8 March 2026 (UTC)[reply]