G1, 209, Vignarajapuram
6th Cross St, Gandhi Nagar, Santhosapuram, Medavakkam, Chennai,
Tamil Nadu 600100
A stain is a discoloration that can be clearly distinguished from the surface, material, or medium it is found upon. They are caused by the chemical or physical interaction of two dissimilar materials. Staining is used for biochemical research, metal staining, and art (e.g., wood staining, stained glass).