The bathtub ring likely formed due to the evaporation of water, which leaves behind minerals and sediments that were dissolved in the water. As the water level decreases, these substances accumulate along the edges, creating a visible ring. Factors such as water temperature, mineral content, and the frequency of water changes can also influence the formation and appearance of the ring. Over time, this process results in the distinct line or band often seen in bathtubs and other bodies of water.
The ring around the bathtub is caused by soap scum an dirt. The ring can be washed off using bathroom cleaner.
Dirt
Your bathtub. Go clean it.
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.
stratum corneum
The color of the ring that the cat leaves in the bathtub in "The Cat in the Hat Comes Back" is pink.
PINK
This might refer to the dirty ring left around a bathtub when someone soaks in a bathtub with soapy bubbles then empties the water. The dirty soap clings to the the sides of the bathtub leaving a ring mark of residue where the high water level was.
PINK
Bubble bath residue and epithelial tissue.
PINK
A bathtub ring forms from the residue left behind when water evaporates, leading to the concentration of soap scum, body oils, and minerals along the water line. These substances then combine to create a visible ring around the tub. Regular cleaning can help prevent the buildup of this residue.