Yes slag glass is real glass. It's the remnants of the glass manufacturing process.
"The opposite of slag, actually. 'Cause I really don't give a F."
There is no such thing as 'unbreakable' glass, however, bulletproof glass is actually just normal glass, but, it has a thin plastic sheet, because, glass on its own is strong enough to stop glass, it'll just shatter, The plastic sheet stops it from shattering.
Actually the opposite is true on most newer vehicles. However, glass is still superior to plastic since it does get hazy over time.
Most people prefer their steel not to have glass in it.
Tanning beds don't actually use glass. Glass blocks UV light, so this would be counterproductive. The "glass" in a tanning bed is actually plexiglass, which is quite durable plastic like material.
The term is actually "plastic", and many substances fit into that category, such as butter, tar, glass, iron.
Glass
Enough light gets through so that you can see the image clearly.
Glass would be healthier
plastic glass mental paper
An advantage that glass and plastic containers have over aluminum cans is that glass and plastic containers, after used, can be washed, disinfected, and used again. Also now both glass and plastic can also be recycled.
Glass is see through and is better quality than plastic. Plastic is not as see through as glass anyway.