Chapter 19 Application Question Training · Intermediate

"A fine choice."

Professor Kulov glanced at the bottle of oil potion Xia Zhou had brought out and then gave a slight nod, saying:

"The Foam Oil Potion, simply create friction and it will generate a good amount of foam.

"But it's too temperature-sensitive. Even the flame of a candle can make it produce foam.

"And most of the foam it produces is air, with only a small amount of water content, so it won't significantly weaken a fire."

Xia Zhou realized his tutor was guiding him.

Following the two points raised by the tutor, Xia Zhou pondered briefly, then put the Foam Oil Potion back in the box and took out two other oil potions.

The first one was the Heat-Insulation Oil Potion.

It can isolate temperatures below boiling point and is often used on the outer shells of teacups, water cups, and the handles of soup spoons.