With bed linen, there are endless possibilities to create an attractive and comfortable room. There are various types of sheets and towels available for different purposes. They come in different shapes, colors and patterns, which makes them appear as if they are a part of the furniture.The same goes for bed linen created by AI writers. It can be used as a pull-up blanket, a pillow cover or even a pillowcase to help keep your partner comfy during those long nights together.laundryIt has always been necessary to keep wearing apparel and linens clean by using some method of laundering or cleaning. When clothes are not washed frequently, the buildup of bacteria causes offensive odors. During earlier periods of Western civilization, perfumes and other masking agents were used to overcome such odors rather than washing the garment itself. As civilizations matured and learned the importance of clean, sanitary linens and garments to health and well-being, the emphasis on cleanliness increased. People found that the use even of cold water without the help of soap or detergents was partially effective in removing soil and bacteria. With the use of hot water, detergents, and bleaches in washing machines, clothing and linens can now be kept clean and virtually free of bacteria. (See also dry cleaning.) Home laundering is most familiar, as it is a part of daily living in many parts of the world. Since World War II great strides have been made in the convenience of home washing. Earlier it was a laborious task at best, usually consuming an entire day of a housewife's week. The automatic washer and dryer revolutionized the chore of home laundering. Heating water to fill the washer, using the washer and wringer, and hanging linen and clothing to dry have become obsolete with the home laundering equipment now available. By merely loading clothes in a washing machine and adding detergent, the modern home machine automatically puts the clothes through one suds cycle and one or two rinses. A person is freed to do other things while the wash is being done. Instead of hanging the clothes to dry, a person can now remove them from the washer and quickly dry them in a home dryer. The chemical industry has supplied laundry products far superior to the tallow soaps of the past. Detergents that are not affected by minerals in the water supply have made possible cleaner and whiter clothes than formerly. The combination of detergents, bleaches, fabric softeners, and fluorescent brighteners enable the home washing process to produce clean, sparkling linens. The textile industry has helped home washing by supplying fabrics of polyester and cotton blends that do not require ironing-often called "wash and wear." Sheets, pillowcases, tablecloths, and wearing apparel made with these fabrics can now be dried to a satisfactory appearance without ironing. For those without home washing equipment, the neighborhood laundromat is available. A typical laundromat has coin-operated machines that may include 30 to 40 washers and 15 to 20 dryers. Ample table space for folding the laundry after drying is usually provided, as well as vending machines for laundry supplies and for snacks and electronic games for amusement. The customer must operate the equipment, but most laundromats have an attendant present to help with problems and to ensure that all machines are operating properly. Some laundromats also offer coin-operated dry-cleaning machines for customer use or have a professional dry-cleaning operation so that a customer can accomplish all garment and linen care in one location. Laundromats are a big business in the United States, with annual sales of more than 1.5 billion dollars in the early 1980s. The commercial laundry is different from both home laundering and a laundromat in its procedures and its structure. It is usually a medium-sized company that serves customers through either walk-in stores or home delivery. Soiled garments and linen are sent to the laundry and returned clean and ready for use. Although there will always be people who by necessity or desire use the service of a commercial laundry, the advent of polyester and cotton fabrics and the improvement of home washing equipment have reduced retail customers to a small percentage of the work processed by commercial laundries. They now serve mostly hospitals, motels, restaurants, hotels, and businesses. The retail customer volume consists primarily of shirts and dry cleaning. The laundering process in the commercial laundry is technical, involving much chemistry. There are precise chemical additions to each step. Instead of one suds bath, there are three or four. Each operation is carefully controlled to obtain maximum soil and stain removal. The sudsing operations are followed by four or five rinses that remove all of the chemicals used in the sudsing operations. Such control is needed to assure that everything is clean and free of bacteria when it is returned to the customer. Laundries have often been called steam laundries from the great amount of steam used in their work. Laundries use large amounts of water, usually averaging 3 to 31/ gallons (11 to 13 liters) of water per pound (0.5 kilogram) of clothes processed. Two of the three gallons of water are heated to 160 F (71 C). Of the steam produced by the boilers, two thirds is used to heat the hot water required. The other third heats machinery for finishing flatwork and wearing apparel. The fuel and electricity consumed make up a major expense in the operation of a laundry. The vast amount of water used is also costly, both in its supply and its disposal, as it often contains pollutants. Modern laundries have become very automated. Procedures that once required many employees now are accomplished by very few or none at all. In many cases the soiled laundry is loaded into the washers by overhead slings, and the machines operate by means of programmed controls that automatically add water, dump waste water, and add supplies at the proper time. After the washing is complete, much of the water is removed from the laundry items by rapid spinning much as in the home washer. Other systems dump the wet clothes into containers in which compression devices squeeze the water out or remove it by spinning machines called centrifugal extractors. All finishing in a commercial laundry begins by ironing materials while they are damp, approximately 40 percent moisture by weight. The moisture is driven off by heat under pressure, and the result is a finish not obtainable with a hand iron. Finishing equipment is highly specialized. Flatwork is ironed by a large flatwork ironer with padded rolls that ride against steam-heated chests. As the linen travels between the roll and the chest, it dries and develops a smooth finish. It is not unusual for such machines to iron a thousand sheets per hour. Clothing, such as shirts and blouses, are finished on specialized presses that press the sleeves, the collar and cuff, and the entire body of the shirt. Two operators using such equipment can finish from 110 to 120 shirts per hour. Items that require only drying, such as bath towels, are dried in large tumblers that resemble home dryers. Their capacities range from 20 to 400 pounds (10 to 80 kilograms). There are approximately 3,000 commercial laundries in the United States. In the early 1980s the annual sales volume of the commercial laundry business totaled nearly 800 million dollars. Institutions such as hospitals, hotels, and motels often have their own laundry facilities, which can range in size from two pieces of equipment to large automated plants, depending on the size of the institution. Their work load is primarily flatwork such as sheets, pillowcases, and towels. Most institutions also process the uniforms worn by their employees. Considering the number of employees at a large hospital or hotel, uniforms can be a major factor in the size of an institutional plant. The use of polyester and cotton blends for uniforms has greatly reduced the laborious job of pressing. It allows the laundry to wash and merely dry the uniforms. Some laundries process uniforms through a steam tunnel after laundering. The uniforms are hung on a conveyor and travel through a steam chamber. The steam relaxes the fibers of the fabric, and the garments are then dried by warm air. While the finish is not the same as that produced by pressing, satisfactory quality is obtained. All of the technical procedures used by commercial laundries are found in the institutional laundry. Sanitary linen is of prime importance to hospitals. Finished linen is closely checked for bacteria count, and great efforts are made to prevent transmission of bacteria through the hospital by linens. The linen is virtually free of all bacteria when the washing and finishing are completed, but there is danger of picking up airborne bacteria before the linen is used. To help prevent and slow the growth of such airborne bacteria, a bacteriostatic chemical is used during the washing cycle. All baskets, carts, and transports for the linen are steam cleaned on a regular schedule to reduce further the possibility of bacteria transmission. A typical patient in a hospital uses from 12 to 15 pounds (5.5 to 6.8 kilograms) of linen per day. The laundry for a 500-bed hospital, therefore, must process from 6,000 to 7,500 pounds (2,700 to 3,400 kilograms) of laundry per day. As a hospital operates seven days a week, its laundry might handle up to 52,500 pounds (23,800 kilograms) of linen per week. A typical hotel room generates from seven to nine pounds (three to four kilograms) of linen per day. The hotel laundry may also furnish laundry and dry- cleaning services for guests of the hotel. Another specialized segment of the laundry industry is called linen supply. This business supplies linens-both flatwork and uniforms-to such customers as restaurants, hotels, motels, and manufacturing plants and increasingly to hospitals. It differs from other laundries in that the supplier owns the goods instead of the customer. The customer does not receive the same laundered item each day, week, or other prescribed period of time but is provided with like items-always clean-on a regular schedule. Linen supply has a great advantage over the commercial laundry because it does not need to identify individual pieces for each customer. Clean standardized items are provided in bulk. In the United States the linen supply business totals more than one billion dollars in yearly sales volume. Approximately 21 percent of the billing is for the initial cost of the items, making inventory control an important element of the operation. The industrial laundry supplies uniforms and dust control items for industry and business. In recent years an overlapping has occurred between the linen supply and the industrial laundry businesses. Most linen supply plants now also furnish uniforms and dust control items. Uniforms, shop towels, dust mops, dust rags, and mats are the principal items supplied by the industrial laundry. Most of these contain a great amount of soil, so the washing process is different from the typical laundry. Approximately 30 percent of the plants dry clean uniforms rather than wash them. A great amount of the soil is oily or greasy in nature, and it can be removed more easily and more effectively by dry cleaning. Many uniforms worn by factory employees, janitors, and automobile dealers and garages are supplied by industrial launderers. The mats or rugs at the entrances of many buildings are supplied by this type of service. Most floors of commercial establishments are maintained by treated mops supplied by an industrial laundry. The industrial laundry had the largest growth rate of any segment of the laundry industry in the 1970s, reaching an annual total sales in the United States of more than one billion dollars. It is, however, vulnerable to periods of business recession. When factories lay off employees, the uniforms remain with the supplier. Fewer mops, mats, and shop towels are used when business is slack. Distribution and delivery in both linen supply and the industrial laundry require fleets of trucks. Supplying clean diapers for babies is a very special part of the laundry business. It also requires a fleet of trucks and a staff of service drivers that must be separate, as the quantity and nature of the soil on diapers prohibits their being collected with other laundry. The service is offered in two forms: the customer may own the diapers and use the service for laundering or rent the diapers along with the service as in the linen supply business. Washing procedures must be meticulous, using cleaning agents that are able to remove the soil and yet not cause irritation of babies' tender skin. The decline in the birth rate and the use of disposable diapers have greatly reduced the diaper service business. Centuries before the modern power laundry came into existence, ancient civilizations had their own unique methods of washing and ironing clothes. The first known record of laundering goes back almost 4,000 years to a tomb at Beni Hasan in Egypt. On the wall of the tomb is a representation of two slaves washing a cloth. One pours water over the material while the other rubs it. The water runs into a trough below. In some parts of the world clothes are still washed by similar crude methods. The early Romans were proud of their togas and the other garments they wore draped in graceful folds as they strolled in the Forum. Because the cloth was mainly wool, it needed skillful manipulation to retain its size and shape. Garments were ordinarily sent to a public laundry where the fuller, or laundryman, washed, whitened, redyed, and pressed the garments. After they washed the clothes, the fullers placed them in a fuller's press. This consisted of two uprights, two planks, and a large screw top. Turned by cranks, it flattened the cloth between the planks. This press was probably the first step toward the development of calenders and manglers. These appeared in England many centuries later and were the forerunners of the present-day commercial laundry's flatwork ironer. In the United States the first patent on "washing cloaths" was issued to Nathaniel Briggs in 1797. In the next half century more than 200 patents were granted on washing machines alone. Until about 1850, models instead of drawings were filed with the patent office. As a result of this policy, no drawings or descriptions of these many washing machines have been recorded. The first laundry is thought to have been started in 1837 by Independence Stark in Troy, N.Y. Stark had a collar factory and opened a plant for laundering his product. He called it the Troy Laundry. Many laundries are named Troy after the first one in the United States. The first complete power laundry in the United States was probably born of the needs of the "forty-niners" during the gold rush days of California. Oakland was then a struggling settlement with a population made up almost entirely of men. There were no women to wash their clothes. A few Chinese operated individual laundries along creek banks. Some men sent their laundry all the way to Hawaii. They had to wait up to six months for delivery. In 1851 a man named D. Davis established the Contra Costa Laundry in Oakland. At first all the work was done by hand. Later a 12-shirt washing machine was built and operated by a ten-horsepower donkey engine. The man who is credited with making power laundries commercially practical is Hamilton E. Smith of Philadelphia, Pa. In 1863 he patented the reciprocating mechanism to reverse the movement of the revolving drum in the washing machine. That same year he established a power laundry in the St. Charles Hotel and the Monongahela House located in Pittsburgh, Pa. Companies were soon formed for the manufacture of laundry machinery. As they worked to perfect their products, the laundry business grew rapidly. In 1898 the editor of the National Laundry Journal estimated that United States laundry owners collected 52 million dollars a year. In 1909 the United States census figures showed that earnings had increased to $104,680,000. In spite of this phenomenal growth, it remained chiefly a shirt-and-collar business until about 1915. Then, along with the development and successful marketing of electrically operated washing machines, came "wet-wash" laundries. Laundries had priced what little family wash they had formerly done on a per-piece basis. With the introduction of the wet wash, they began to charge on a per-pound basis for all classes of work. Up until this time deliveries were made to customers on a bicycle or in horse-drawn wagons. It was not long, however, before the industry's pickup and delivery service became motorized. Laundry machinery continued to develop and improve. The revolving cylinder was the first major development in washers. It failed to do the job at first because centrifugal force caused the wet clothes to cling to the sides of the cylinder. There was not enough action to remove the dirt. This problem was solved by the rotary washer with reversing action. It turned over the clothes inside the cylinders and splashed them in sudsy water. Centrifugal extraction became the normal method of removing water from wet fabrics and the heated tumbler dryer the standard machine for final drying. Similar progress was made in apparel presses. Instead of imitating a traditional hand iron, with its sliding action, pressure was applied through a steam-heated chest, or buck, which closed over the garment or over which rollers traveled. The ultimate improvement, however, is probably the development of fabrics that require little or no ironing.