Beer has a long history. The earliest beer appeared around 3000 BC and was brewed by the Semitic people in Persia. At that time, beer didn't even have foam, let alone in a bottle. With the continuous development of history, beer began to be sold in glass bottles in the middle of19th century.
From the beginning, people subconsciously thought that glass was green-all glass. For example, ink bottles, paste bottles and even window panes are all green, and of course beer bottles are included.
Because the original glass manufacturing process was not mature, it was difficult to remove impurities such as ferrous ions from raw materials, so most of the glass at that time was green.
Of course, the times are constantly developing, and the manufacturing technology of glass is also progressing. When impurities in the glass can be completely removed, the beer bottle is still green. Why? This is because the process cost of completely removing impurities is too high, and the mass production of beer bottles is obviously not worth such a huge cost. Most importantly, people found that green wine bottles can delay the deterioration of beer.
That's good, so by the end of 19, even though transparent glass without impurities can be made, people still specialize in producing green glass bottles to hold beer.
However, it seems that the road to hegemony of green wine bottles is not so smooth. Beer is actually "afraid of light". Long-term sunlight exposure will lead to a sudden increase in the catalytic efficiency of bitter components in beer, thus accelerating the formation of riboflavin. What is riboflavin? It will react with another substance called "isoα acid" to form a harmless but smelly and bitter compound.
In other words, beer tends to stink in the sun.
Because of this, in the 1930s, a competitor appeared in the green wine bottle-brown wine bottle. By chance, it was found that filling wine in a brown bottle can not only delay the bad taste of beer more than that in a green bottle, but also effectively block the sun and keep the beer in the bottle better. So later, there were more and more brown bottles.
However, in the end, Green Bottle regained its dominant position.
During the Second World War, the demand for brown bottles in Europe began to exceed the supply, which forced some beer brands to re-use green bottles to produce beer. Because of the good quality and wide sales of these brands of beer, green bottles once became synonymous with beer.
But the green bottle is still difficult to compete with the brown bottle on its own. Thanks to the help of the refrigerator, he finally defeated the brown bottle. In other words, with the popularization of refrigerators and the progress of sealing technology, the advantages of brown bottles have been eroded and will not be better than green bottles.
People often see colored beer bottles in bars. How is it made?
Because most beer bottles on the market are green, bars will buy a large number of empty green bottles, and then decolorize them (the chemical reaction is too complicated, and interested partners can Baidu themselves ~), and the decolorized green bottles will become colorless glass bottles. After this coloring reaction (as above), you can make colorful wine bottles, which is very cool ~