After being left in the magical liquid for less than five minutes, the four younglings were carried out and dumped into a clear water pool to wash away the excess magical liquid on their bodies.
One of the four younglings' dragon skin had peeled away from the magical liquid bath. Its armpits, belly, and neck showed purplish marks where they were corroded.
There was one of them whose eyes were also dyed slightly purplish.
The benefit this corrosion brought to the two younglings was that their arcane talents were now far greater than what they had been. They were almost at the peak which dragons of their age could reach.
After washing away the excess magical liquid, they rolled about in crystalline sand to toughen up their hide and quicken its hardening.
The crystalline sand was specially made. The toughness and frictional force it would supply were calculated by the seven-colored dragons. There was no room for error.