Stains are made of chemicals with loose ends. These ends stick to loose ends on what they stain.
IN ADDITION:.
A stain is a pigment that has to have a surface that will accept it. Meaning that if a...
A stain is a discolouration of any surfance on which it may be found. It may be intentional or accidental. It is caused by the chemical interaction of two or more differing materials. Stains are...