What is the coffee ring effect and how can you remove coffee stains?

The coffee ring effect refers to the fact that when a drop of coffee drops onto the tabletop, its particles will leave a stained stain on the tabletop, and the color is uneven, and the edge part is darker than the middle part, forming a ring stain. In 1997,University of PennsylvaniaPhysicists discovered the café effect, which is mainly influenced by the particle shape of the liquid stain.

1. Coffee ring effect In life, many people like coffee, when you accidentally drop coffee on the table, when it slowly evaporates, you will find that there will be a stained stain on the table, the color of this stain is not uniform, the edge will be darker than the middle color, and it looks like a ring-shaped spot. Later, after research, some physicists called this phenomenon the coffee ring effect.

2. The Principle of the Coffee Ring Effect The principle of the coffee ring effect is that the particle state of an object can affect its shape. In our daily lives, it is common for liquids to drip onto the table. When liquid is splashed on the table, the stain will be left as the liquid evaporates, and the outer circle will not disappear, leaving a mark on the paper.

This is because particles of different shapes have varying properties at the air-water interface, and different properties lead to different traces. It is because of the discovery of the coffee ring effect that scientists.

We are also conducting research on coatings and inks, and we want to change the shape of particles through some physical principles to eliminate them.

3. Remove coffee stains In life, when coffee drips onto clothes, we can use glycerin.

and egg yolks in a mixed solution.

to wipe and then bleach in clean water. Or just coat the coffee stamps with glycerin and rinse them off with warm water. If you want to be lazy, you can apply white vinegar to the towel and gently rub the stain to remove it.

A coffee ring is a drop of coffee that falls onto a garment, forming a stain that is dark in the middle and gradually lightens around the periphery. The way to remove this coffee stain is to apply a layer of grease and extract it to remove the stain.

The coffee ring effect is a ring-like stain formed when a coffee stain spills onto the table and dries. To remove coffee stains, you can wipe it with a rag dipped in alcohol.

Refers to the uneven color of the stains left by the coffee on the tabletop, and the edges are dark in color. It can be wiped with white vinegar.

The coffee ring effect refers to the phenomenon that when a drop of coffee or tea falls on the tabletop, the particulate matter will leave a dyed ring on the tabletop, and the color of the ring is uneven, and the edge part is darker than the middle. Physicists at the University of Pennsylvania have uncovered the "coffee ring" effect, mainly due to the influence of the shape of the liquid particles and the direction of flow.