What are eyeglass lenses made of?
Eyeglass lenses take polycarbonate and glass directly. Trace them back and you pass 18 made things on the way to 13 raw materials.
How eyeglass lenses are made See it on the map
What goes straight in
From the ground: 13 raw materials
- Silica sand through glass
- Limestone through glass
- Air through polycarbonate, acetone
- Crude oil through polycarbonate, propylene
- Rock salt through polycarbonate, chlorine
- Water through polycarbonate, chlorine
- Trona through glass, soda ash
- Sulfur through polycarbonate, chlorine, sulfuric acid
- Natural gas through glass, soda ash, carbon dioxide
- Corn through glass, soda ash, carbon dioxide
- Coal through polycarbonate, acetone, benzene, toluene
- Sugarcane through glass, soda ash, carbon dioxide, baker's yeast, molasses
- Sugar beet through glass, soda ash, carbon dioxide, baker's yeast, molasses
Made along the way: 16 things
Chemicals and fuels 14
PhenolPropyleneAcetoneCaustic sodaChlorineSoda ashBenzeneNaphthaSulfuric acidAmmoniaCarbon dioxideQuicklimeHydrogenToluene