I am looking for information on the history of glass lenses. Which city made a monooply on glass manufacturing?
what is lead glass, crown glass, flint glass? how are colored glasses made?
what are the two early types of optical glass?
what is striae?
how are bubbles and seeds created in the lenses?
what is the name of the process used to remove strain from glass?
what is the difference between heat treated and chem treated?
Bookmarks