YENZIWA NJANI IGLASS EVUNYIWEYO ?

Iglasi epholileyo yomelele ngokuphindwe kane kuneglasi "eqhelekileyo," okanye i-annealed, iglasi. Kwaye ngokungafaniyo negilasi efakwe emanzini, enokuqhekeka ibe ziingceba ezijijekileyo xa yophukile, iglasi epholileyo yaphuka ibe ngamaqhekeza amancinci angenabungozi. Ngenxa yoko, iglasi epholileyo isetyenziswa kwezo ndawo apho ukhuseleko lomntu luyingxaki. Izicelo ziquka iifestile ezisecaleni nezingasemva kwizithuthi, iingcango zokungena, ishawara kunye neendawo ezivaliweyo zebhafu, iinkundla zebhola yomdyarho, ifanitshala yepatio, ii-oveni zemicrowave kunye nezibane zasesibhakabhakeni.

Ukulungiselela iglasi yenkqubo yokufudumala, kufuneka kuqala inqunywe kwisayizi oyifunayo. (Ukunciphisa amandla okanye ukungaphumeleli kwemveliso kunokwenzeka ukuba kukho nayiphi na imisebenzi yokuvelisa, efana ne-etching okanye i-edging, emva kokunyangwa kobushushu.) Iglasi ke ihlolwe ngenxa yokungafezeki okunokubangela ukuphuka kuyo nayiphi na inyathelo ngexesha lokufudumala. I-abrasive efana ne-sandpaper ithatha imiphetho ebukhali kwiglasi, ethi emva koko ihlanjwe.
ISIBHENGEZO

Emva koko, iglasi iqala inkqubo yonyango lokushisa apho ihamba khona nge-oven evuthayo, mhlawumbi kwi-batch okanye isondlo esiqhubekayo. I-oveni ifudumeza iglasi kwiqondo lobushushu elingaphezulu kwama-600 ngokukaCelsius. (Umgangatho woshishino yi-620 degrees Celsius.) Iglasi ke ingena kwinkqubo yokupholisa yoxinzelelo oluphezulu ebizwa ngokuba yi "quenching." Ebudeni bale nkqubo, ethatha imizuzwana nje, umoya woxinzelelo oluphezulu udubula umphezulu weglasi ukusuka kuluhlu lwemilomo ekwindawo ezahlukeneyo. Ukucima kupholisa imiphezulu engaphandle yeglasi ngokukhawuleza kakhulu kunombindi. Njengoko umbindi weglasi uphola, izama ukutsala umva ukusuka kumphezulu ongaphandle. Ngenxa yoko, iziko lihlala likuxinzelelo, kwaye imiphezulu yangaphandle iya kuxinzelelo, okunika iglasi epholileyo amandla ayo.

Iglasi ekuxinaniseni iqhawuka ngokuphindwe kahlanu ngokulula kunokuba isenza kuxinzelelo. Iglasi edibeneyo iya kuphuka kwi-6,000 pounds nge-intshi yesikwere (psi). Iglasi epholileyo, ngokweenkcukacha ze-federal, kufuneka ibe ne-surface compression ye-10,000 psi okanye ngaphezulu; yophuka ngokubanzi malunga ne-24,000 psi.

Enye indlela yokwenza iglasi epholileyo kukufudumeza kweekhemikhali, apho iikhemikhali ezahlukeneyo zitshintshisa ii-ion kumphezulu weglasi ukuze zenze uxinzelelo. Kodwa ngenxa yokuba le ndlela ixabisa ngaphezulu lee kunokusebenzisa iionti zokutshisa nokucima, ayisetyenziswa kakhulu.