Ubuhlalu beglasi obubonisa umgwaqo buwuhlobo lwezinhlayiya zeglasi ezincane ezakhiwe ngokuvuselela ingilazi njengezinto zokusetshenziswa, ezichotshoziwe futhi zancibilikiswa ekushiseni okuphezulu yigesi yemvelo, ebonakala njengendilinga engenambala nebonakalayo ngaphansi kwe-microscope. Inkomba yayo yokubuyisa iphakathi kuka-1.50 no-1.64, futhi ububanzi bayo ngokuvamile buphakathi kwama-micron ayi-100 nama-micron ayi-1000. Ubuhlalu beglasi bunezici zokuma okuyindilinga, izinhlayiya ezincane, ukufana, ukucaca kanye nokumelana nokuguguleka.
Ubuhlalu beglasi obubonisa umgwaqo njengophawu lomgwaqo (upende) ezintweni ezibonisa umgwaqo, bungathuthukisa ukusebenza kopende wokumaka umgwaqo obonisa ukubuya, buthuthukise ukuphepha kokushayela ebusuku, kuhlonzwe eminyangweni yezokuthutha kazwelonke. Uma imoto ishayela ebusuku, izibani zangaphambili zikhanya emgqeni wokumaka umgwaqo ngamahlamvu engilazi, ukuze ukukhanya okuvela ezibani zangaphambili kubonakale emuva ngesikhathi esifanayo, ngaleyo ndlela kuvumela umshayeli ukuthi abone indlela yokuthuthuka nokuthuthukisa ukuphepha kokushayela ebusuku. Namuhla, ubuhlalu beglasi obubonisa umgwaqo sebuyinto ebonakalisa umgwaqo engenakuphikwa emikhiqizweni yokuphepha emgwaqweni.
Ukubukeka: kuhlanzekile, akunambala futhi kusobala, kugqamile futhi kuyindilinga, akunamabhamuza noma ukungcola okusobala.
Ukuzungeza: ≥85%
Ubuningi: 2.4-2.6g/cm3
Inkomba yokubukeza: Nd≥1.50
Ukwakheka: ingilazi ye-soda lime, okuqukethwe yi-SiO2 > 68%
Ubuningi obukhulu: 1.6g/cm3