Stain Removal Techniques
There are two basic approaches to removing spots and stains. You can use a stain-removal agent that interacts with the stain chemically, or you can physically loosen or remove the stain from the surface. Many stubborn stains require both chemical and physical treatment. In this chapter, we discuss eight physical stain-removal techniques: brushing, flushing, freezing, presoaking, pretreating, scraping, sponging, and tamping.
Which technique to use in treating a particular spot or stain depends upon both the nature of the stain and the type of surface stained. For example, a stain may be wet or dry, semisolid or hardened. On a very delicate surface, you may not be able to use such techniques as scraping and tamping. A stain may be flushed more easily from a loosely woven fabric than from one that is tightly woven; but a tightly woven fabric can withstand a treatment such as tamping more successfully