I just saw a video title on YouTube that said something like “Why is glass transparent?” And that’s an interesting question and...
I just saw a video title on YouTube that said something like “Why is glass transparent?” And that’s an interesting question and I’m sure it’s great that the video exists but my first thought was like “Because glass is terrible, obviously.” Because it’s unwieldy and let’s out warmth and needs to be heated to hundreds of degrees to be shaped and turns into hundreds of tiny daggers if you drop it. Why the hell would we bother with that if it didn’t have some magical quality like being totally transparent despite being solid? Glass is transparent because if it weren’t, we’d use something else.
looking through my “me” tag and this is apparently what I was thinking 3 years ago
If you’re still curious we did not start working glass for its transparency. It was most likely started as a sanitary concern. Glass is easy to clean with soap and water, once it’s cleaned out you can use it again for anything and no germs or flavor from the previous meal or drink will remain.
Other materials at the time, namely clay, would absorb flavors and germs meaning that if you ate beef off a clay plate your next meal with that plate could have beef flavor and microbes common on cow meat on it. That would leak out seemingly at random no less. Heck imagine a sick person coughing into their soup bowl and then months later their germs hiding in the clay would pop out to infect whole new people.
Also the earliest human use of glass we know of is for its sharpness. Pre-historic people would use volcanic glass as sharp knives for food preparation. Also beads. Pretty much any new substance humans get their hands on for most of our history we immediately try to make into beads.
The fact that it could become see through was a side benefit.
this is amazing and I’m really glad I reblogged that old bullshit post because I got to learn this
All very interesting.
Plus: Pretty much any new substance humans get their hands on for most of our history we immediately try to make into beads
Including Trinitite, which is what the ground turns into under an atomic blast. Yep. People saw bits of radioactive bombed-out melted desert and thought “let’s make jewelry out of this!”
However, it’s worth noting that the transparency was initially pursued just because it made wine look nicer
Roman glass production developed from Hellenistic technical traditions, initially concentrating on the production of intensely coloured cast glass vessels. However, during the 1st century AD the industry underwent rapid technical growth that saw the introduction of glass blowing and the dominance of colourless or ‘aqua’ glasses.
(…)
As a result of these factors, the cost of production was reduced and glass became available for a wider section of society in a growing variety of forms. By the mid-1st century AD this meant that glass vessels had moved from a valuable, high-status commodity, to a material commonly available: “a [glass] drinking cup could be bought for a copper coin” (Strabo, Geographica XVI.2).
(…)
The siting of glass-making workshops was governed by three primary factors: the availability of fuel which was needed in large quantities, sources of sand which represented the major constituent of the glass, and natron to act as a flux. Roman glass relied on natron from Wadi El Natrun, and as a result it is thought that glass-making workshops during the Roman period may have been confined to near-coastal regions of the eastern Mediterranean.[11] This facilitated the trade in the raw colourless or naturally coloured glass which they produced, which reached glass-working sites across the Roman empire.[11]