If you've ever spilled a drop of coffee on a surface, you might have noticed the curious way the color concentrates at the edges when the coffee dries. This is known as the "coffee ring effect," and recently, researchers have determined that the shape of the particles in the liquid is an important factor in creating this pattern.

Source: Future of inks, paints and coatings...e shape affects the 'coffee ring effect'

David Cottle

UBB Owner & Administrator