Isn’t the temperature for melting glass higher than than the figures given in the article? Decided to not be lazy and went to Google. Found this, “Most glass melts at 1400 to 1600 degrees Farenheit. Nevertheless, there are specialized glasses that will melt at as low as 900 degrees. A kiln is necessary to raise the temperature of glass to 1400C to 1600C degrees, while a blow torch can raise the temperature of glass to approximately 900 degrees.” This article actually said farenheit, but all other articles were saying Centigrade so I changed used them both, but suspect Centigrade is correct and much hotter than the posted article says.
Transformation of brain tissue to a form of glass may occur at lower temps. :^)