Crystal clear glass manufacturing analysis

Ordinary window glass, oil bottles, wine bottles, etc. with a touch of green, this is the raw material for the production of glass contains green iron caused by impurities. Some medicine bottles, beer bottles, and soy sauce bottles are brown, which is still caused by iron impurities, but it is not bivalent iron ions but trivalent iron ions.

One of the important raw materials in beer is hops, which gives the beer a special bitter taste.
The hops are light-sensitive, they decompose under the effect of ultraviolet rays in the sun, creating an unpleasant "sunny smell." Colored glass bottles can reduce this reaction to a certain extent, but the effect of brown bottles is better than green.
There are colorless and transparent bottles of beer on the market, and the hops added in the production are processed.


To make glass without color, the raw materials used must not contain iron. However, natural sand, limestone and soda ash will always have some iron compounds. How to eliminate the green in the glass? The chemical approach is to add a certain proportion of manganese dioxide to the glass melt. Manganese dioxide is an oxidant that oxidizes green divalent iron ions to yellow trivalent iron ions and manganese to purple trivalent manganese. Yellow and purple synthetic white, the glass becomes colorless and transparent. Glass contains different metal compounds that are "stained" in various colors. Add cuprous oxide, you can get red glass; add oxide drill - blue glass; add chromium oxide - green glass;

In addition: In order to prevent direct sunlight, so use brown or green. Brown or green can filter out ultraviolet rays, and direct ultraviolet rays can reduce its nutritional value.

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