"The blue flame produced by the burning carbon crystal is hotter than a blowtorch. It's not that the temperature isn't high enough; it's that I'm controlling the fire and suppressing the heat of the flame," Lin Tian explained without turning his head, then focused intently on the stalactites inside the cauldron.
"Why suppress the temperature?" Zi Yan, embodying curiosity, asked oddly.
Since it was just the essence extraction stage, Lin Tian was a bit at leisure and answered, "Extracting the essence of stalactites is very meticulous. You can't use fierce heat; you must slowly heat it, allowing the temperature to seep gradually into the stone's core."
"The core continuously accumulates heat. Once it reaches a certain point, the center melts first. When the entire interior has melted, the liquid pressure breaks the stone's surface, and the oozing liquid is the essence we need. Since impurities melt at higher temperatures, they are separated from the essence."
