a glass pane consisting of a single layer of glass which has been subjected to special treatment to increase its mechanical strength and condition its fragmentations after shattering
toughened safety glass - glass which has been converted to safety glass by subjection to a process of heating and rapid cooling, so that, if fractured, it disintegrates into small pieces and, in addition, its liability to fracture under the action of external forces or changes of temperature is greatly reduced
TETi järgi jaguneb safety glass (turvaklaas) järgmiselt: laminated glass, toughened glass, wired glass. TET annab ka toughened glass vasteks 'purunemiskindel klaas', 'turvaklaas', ent U60011 tuleb nende vahel vahet teha (toughened-glass on kitsam kui safety glass). Seega vaste TSRist ja EKNist - 'karastatud klaas' (sama ka soome keeles). [11.03.2002]
safety glass - (1) Laminated glass ... (2) So-called toughened glass, formed by putting the surfaces into compression, either by chilling them with air jets from close to the softening point (thermal toughening), or by exchanging sodium ions in the surfaces for larger ions (chemical toughening). Stronger than untreated glass, with blunter fracture fragments, but toughness is unaffected. (3) glass incorporating wire mesh to hold fracture fragments in place, but weaker than plain glass.
