Zo’r yong’inga chidamli shisha eshik 1,000 darajadan ortiq yuqori haroratli olovda yonadi. Sinovdan so’ng u 90 daqiqa yoki undan ko’proq vaqt davomida erimasdan yoki portlamasdan saqlanishi mumkin. Yuqori sifatli yong’inga chidamli shisha singandan keyin hamon to’g’ridan-to’g’ri burchak holatidadir va parchalar temperli shishadan kichikroq.

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