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what is dry cleaning:-- Dry cleaning is any cleaning process for clothing and textiles using an organic solvent other than water. Dry cleaning is necessary for cleaning items which would otherwise be damaged by water and detergent.
About machine:-A dry cleaning machine is somewhat similar to combination of a domestic washing machine, and clothes dryer. Garments are placed into washing chamber (referred to as the basket, or drum). The washing chamber contains a horizontal, perforated drum that rotates within an outer shell. The shell holds the solvent while the rotating drum holds the garment load. Depending on the size of the machine the basket capacity will be between 20 and 80 lb (9-36 kg) of garments.
Process :- During the wash cycle the chamber is filled approximately 1/3 full of solvent and begins to rotate to agitate the clothing. The solvent temperature is controlled at 85°F (29.4°C), as a higher temperature may extract dye from the garments, causing color loss. During the wash cycle, the chamber is constantly fed a supply of fresh solvent from the working solvent tank while spent solvent is removed and sent to a filter unit comprising a distillation boiler and condenser. The ideal flow rate is one gallon of solvent per pound of garments per minute, depending on the size of the machine.
Before being placed in the machine, garments are inspected for stains and soils by the operator. Depending on the nature of the soil, a catalyst may be applied to the soil; this depends on the operator\\\\\\\'s judgment of the makeup of the textile and the soil itself.
Oil-based soils such as grease, oil or lipstick typically are removed very well by perchloroethylene, whereas water-based soils such as coffee, wine and perspiration will need a catalyst to allow the dry cleaning solvent to emulsify and lift them. Food based grease soils fall in between the two, and a milder catalyst may be applied.
Garments are also checked carefully for foreign objects; items such as plastic pens will melt in the solvent bath and may damage textiles beyond recovery. Some textile dyes are \\\\
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