optical flint
flint glass

It is an ingredient of flint glass, brick mix, and in the manufacture of fiber glass.

Many were produced, in a variety of designs, from flint glass, the only glass produced by early American glass factories.

He is primarily known for his work in developing clear lead crystal glass (also known as flint glass) in England.

Possibly the least known, but vitally important, industry in Ancoats was the manufacture of flint glass.

And the original highly transparent flint glass was no longer available in the appropriate dimensions.

It is used as a paint or cement and also as an ingredient of flint glass.

It is used as a cement, as a paint, and in the manufacture of flint glass.

Often one element is made from crown glass and the other from flint glass.

Newcastle also became a glass producer with a reputation for brilliant flint glass.

The currently known flint glasses have refractive indices ranging between 1.45 and 2.00.