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).
Other articles related to "stain, stains":
... There are four ways to apply a solvent to a fabric for removing stains soaking application of pressure front sponging This is the most common way of treating non-washable fabrics ... The stain is rubbed with the sponge radially, from the centre of the stain towards its edge ... the sponge in a circular motion, as that causes the stain to spread in rings ...
... The Schaeffer–Fulton stain is a technique designed to isolate endospores by staining any present endospores green, and any other bacterial bodies red ... The green stain is malachite green, and the counterstain is safranin, which dyes any other bacterial bodies red ...
... If a stain has "set", it has become chemically bonded to the material that it has stained, and cannot be removed without damaging the material itself ... It is therefore important to avoid setting stains that one wants to remove ... be done by avoiding heat (by not pressing or ironing the stain), sponging stained materials as quickly as possible, using the correct solvent (some solvents ...
... H E stain A pheochromocytoma showing finely granular chromatin ... H E stain Salt-and-pepper chromatin (pheochromocytoma) ... H E stain ...
... 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 ...
Famous quotes containing the word stain:
“There is no man hath a virtue that he hath not a glimpse of, nor any man an attaint but he carries some stain of it.”
—William Shakespeare (15641616)
“It is extraordinary how the house and the simplest possessions of someone who has been left become so quickly sordid.... Even the stain on the coffee cup seems not coffee but the physical manifestation of ones inner stain, the fatal blot that from the beginning had marked one for ultimate aloneness.”
—Coleman Dowell (19251985)
“They own Spode, Lowestoft, candelabra,
Mantels, and hostess gowns, and sunburst clocks,
Turtle soup, Chippendale, red stain hangings,
Aubussons and Hattie Carnegie.”
—Gwendolyn Brooks (b. 1917)