Pyrex® Overview

Pyrex® is a brand of borosilicate glass developed by Corning Inc. Other brand names for borosilicate glass include SIMAX and Kimax®. Borosilicate glass is known for its ability to resist thermal shock. Borosilicate glass is composed primarily of common silicon dioxide (SiO2) with the addition of boron trioxide (B2O3), sodium oxide (Na2O), and aluminum oxide (Al2O3). It is the addition of boron trioxide that is responsible for its higher melting point and its low thermal expansion coefficient. Laser marking Pyrex® is done using a 10.6 micron CO2 laser. The laser interacts with the surface of the Pyrex® by causing localized heat stress. With sufficient laser power, microscopic pieces of glass can be fractured and ejected from the surface creating an frosted mark without significant material removal.

Applicable Laser Processes for Pyrex®

Laser Marking
Laser Engraving