Fireproof glass
Monolithic fireproof glass (DFB) is a kind of "deep toughened" glass, which is made of ordinary sodium-calcium-silicon float glass as raw material.The surface compressive stress of plain toughened glass is much higher than that of plain toughened glass, generally more than 150 MPa, while that of plain toughened glass with the same thickness is between 90 and 110 MPa.
