Glass is a solid liquid it flows very slow as if you ever had a very old piece of glass it will be thicker at the bottom than the top
it takes about 100 years to see a big difference in the glass thickness at the bottom
hope this helps
It can be hard to tell, but one thing about older glass items is that they have an irregular raised area on the bottom. This comes from being hand blown. Newer glass is made by machines.
dimples
The age of a 7 Up bottle could be determined by a professional. If the bottle is assumed to be an antique, an antique retailer should be able to give information about the bottle.
the glass eye the old man had.
nah mate No. You can't unless the glass is scratched. No. You can't unless the glass is scratched. You Suck.
Glass beads are heavier than plastic
diamond is harder if it can be scratched by a rock its glass
Diamond should scratch a piece of glass.
The reason old window glass sometimes looks wavy, is because old methods of producing glass did not produce perfectly clear or flat glass.
As far as anyone can tell... yes. There has not yet been found an example of glass that is not glass. I say nay, glass is melted sand, so glass is sand.
There are a few different tricks that glass collectors use to determine the age of glass. One way is by using an ultra violet light which shows old lead glass as a blue-purple colors and new soda glass as a green-yellow color. Other ways are pontil marks, thickness, even/lopsided, and style.
Troy Glass is 16 years old (born July 27, 2000).
Caitlin Glass is 32 years old (birthdate: November 16, 1981).
Ira Glass is 59 years old (birthdate: March 3, 1959).