Stain

A stain is a spot that has another color than the material on which it is found. It can occur without intention in the case of domestic stains on fabric, cloth, or other material, or it can be intentional. Stains are used intentionally in a variety of fields, including research (biochemical staining), technology (metal staining), and art (wood staining, stained glass.)

Different types of material can be stained by different substances, and stain resistance is an important characteristic in modern textile engineering.  Various laundry techniques exist to attempt to remove or minimize existing stains, and stain removers are an important type of chemical in laundry detergents. Some stand-alone stain removers also exist.

Substances that may create stains
 blood
 chocolate 
 coffee
 fruits and their juices, particularly orange juice
 grass
 grease
 ink (notably permanent marker)
 oil
 sauces (particularly tomato based)
 soda (particularly orange soda)
 sweat
 wine
 table salt
 talc, cornstarch or chalk
 borax
 lemon juice or lemon

Fabrics
 carpet Saturday, March 28, 2020
 cotton
 leather
 silk
 various fabrics in shoes
 wool

Stain removers

 bleach  (do not mix with ammonia)
 ammonia (do not mix with bleach)
 vinegar
 baking soda
 rubbing alcohol
 hydrogen peroxide
 cream of tartar
 sun
 club soda

References

Category:Everyday life