Ipayipi lengilazi elidlulisa igesi noma umhwamuko kusuka esitsheni sempendulo liye endaweni yokuqoqa — lisetshenziswa ekucwengeni, ekukhiqizweni kwegesi nakunoma iyiphi insiza lapho amagesi akhiqizwayo kumele aqondiswe endaweni ethile. Ingilazi ye-borosilicate imelana nokushintsha kokushisa ngokushesha.