Why your clear window has a hidden green tint
In short: Most people assume glass is perfectly transparent, but the edges often reveal a subtle green hue. This video explains the chemistry behind this common occurrence and how industrial innovation changed what we see every day.
The green color in ordinary glass isn't caused by age or dirt; it stems from tiny amounts of iron that enter the material during manufacturing. Because of these impurities, the tint becomes more pronounced as the thickness of the glass increases.
The video also explores the evolution of modern flat glass, specifically highlighting the float-glass process. This industrial breakthrough revolutionized production and allowed for the creation of low-iron glass, which can be manufactured to be almost completely colorless.
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Sources
- Summary by Intellect · source: Why Glass Turns Green When You Look at the Edge
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