What the hell is Pyrex® exactly ?
The Corning Glass Company of New York was established in 1868. Among their first products were colored lenses for railroads and the earliest light bulbs. Much later they formulated Pyrex® brand glass, one of the most significant developments in glass technology this century. Pyrex glass a.k.a. “Corning 7740” set the worldwide standard for scientific and medical glasses. Its resistance to large temperature shifts and chemical reactions have made it a laboratory mainstay.
