Bubble bath residue and epithelial tissue.
The color of the ring that the cat leaves in the bathtub in "The Cat in the Hat Comes Back" is pink.
Dirt
The ring around the bathtub is caused by soap scum an dirt. The ring can be washed off using bathroom cleaner.
PINK
PINK
PINK
When you bathe the dirt and soap floats off your skin and sticks to the side of the tub, leaving a ring when the water is drained.
Your bathtub faucet may be leaking from the handle due to a worn-out or damaged washer or O-ring inside the faucet handle. This can cause water to seep out when the faucet is turned on. It is recommended to replace the washer or O-ring to fix the leak.
Your bathtub handle may be leaking due to a worn out or damaged washer or O-ring inside the handle. To fix it, you can try tightening the handle or replacing the washer or O-ring. If the leak persists, you may need to call a plumber for further assistance.
Your bathtub. Go clean it.
The pink ring inside a russet potato is caused by a reaction between the sugars and starches in the potato when it is cooked at high temperatures. It is not harmful and does not affect the taste or quality of the potato. Its presence is purely cosmetic.
Boron is a metalloid that can prevent bathtub ring by acting as a water-softening agent. When boron is present in water, it can help reduce mineral deposits that cause bathtub rings from forming.