Answer: Wearing laboratory coat.
Explanation: Laboratory coat is a coat like thing made to be wore on the clothes to protect the clothes from damaging.
One should always wear laboratory coat while working in the laboratory to avoid minor and major hazardous damage to the body due to the chemical present there. There are various types of chemicals kept in the laboratory that can damage or spoil the clothes.
Here also, a lab coat should be worn by the person who is using food coloring to track diffusion to protect its clothes from damaging.
