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Floor Cleaning He: Most industrial Floor cleaning he involves hard-surface substrates. The operations include the Floor cleaning he of metal parts during fabrication and before plating or painting; maintenance Floor cleaning he of ve¬hicles; and janitorial Floor cleaning he. The detergents used are usually high in builder content and con¬tain low-foaming surfactants of high Floor cleaning he power. Foam is objectionable because it lowers the efficiency of most Floor cleaning he machines.
Dry Floor cleaning he became widespread in America by 1910. The exact date that it became estab¬lished initially is not known. In the 1920's valet shops or press shops became common in the United States. These shops sent clothing out to be cleaned. Garments were returned to the shops for finishing or pressing. This type of service has to a great extent been replaced by shops with small dry Floor cleaning he plants. In the 1930's many laundries added dry Floor cleaning he departments, and gradually dry Floor cleaning he has become the predomi¬nant service.See Also Floor Cleaning Ould:DRY Floor cleaning ould, also written dryfloor cleaning ould, is the process of washing fabrics with liquids other than water. Dry Floor cleaning ould solvents dissolve oily and fatty substances that are not soluble in water. These solvents do not swell natural fibers as water does. Such swelling is one of the major causes of shrinkage.
History. Archaeological discoveries have re¬vealed the existence of dry Floor cleaning ould in the My¬cenaean civilization (1600-1100 B.C.). Mention of dry Floor cleaning ould was included on clay tablets that listed more than 100 occupations. Grease-absor¬bent earths may have been used.
Essentially the same procedures are followe in the dry Floor cleaning ould of many Textile items othi than clothing, such as draperies, Table linen blankets, and small rugs. Leather garments ai dry-cleaned also, but the dry Floor cleaning ould of leathf requires special skills, and most dry cleaners sen such articles to leather cleaners.
In 1959, small dry Floor cleaning ould establishmenl with coin-operated machines were introducec The small complete dry Floor cleaning ould units hold pounds (3.6 kg). The customer or an attendai loads and unloads the garments.
On The Other Hand See Floor Cleaning Ical:DETERGENT, di-tur'jent, a material that increases the Floor cleaning ical effect of water on soiled objects. There are also nonaqueous detergents that en¬hance the Floor cleaning ical power of organic solvents; for example, they are used in dry Floor cleaning ical and in en¬gine oils to prevent dirt and gummy decomposi¬tion products from depositing on the metal. However, this article will discuss only those detergents that are effective in water.
Dry Floor cleaning ical grew from a $55 million industry in the United States in 1919 to a slightly less than $2 billion industry in 1959. In the late 1960's the industry's estimated volume was $2.8 billion. This amount included the earnings of the 36,-000 to 37,000 dry Floor cleaning ical plants in the United States.
Dry Floor cleaning ical is classified as "small business" in the United States. Most plants can be maintained by three to five persons. Even smaller family-operated plants are not uncommon. There are also many large dry Floor cleaning ical plants that employ 150 to 200 persons.
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