Dyes
Cloths are dyed in different natural colors. Purple dye was the first man made synthetic dye processed from aniline.
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Automatic machinery is now used for the process of dry cleaning and steam press.
Dry Cleaning
Dry Cleaning is a way of cleaning clothes without using water. But the process is not a dry one, because liquid solvents are used instead. The solvents dissolve grease holding dirt and stains to the cloth. In this way, many kinds of stains can be removed that ordinary washing will not remove. Dry cleaning does not shrink clothes or make colors run. As it is not a hot cleaning process, it does not damage delicate and heat-sensitive fabrics.
When you take clothes to be dry cleaned, any bad stains are treated with special chemicals and the dirty clothes are then placed in a large drum. The drum is filled with cleaning fluid, which is often a chemical derived from petroleum, and revolved. The fluid lifts the dirt and stains from the garments. The dirty fluid is drained from the drum and the clothes rinsed in clean fluid. Then the clothes are whirled in a centrifuge to remove most of the remaining cleaning fluid, and finally tumbled in a current of warm air to evaporate any fluid that is left and to remove its odor. Any remaining stains are removed by hand, using special stain removers, and the garments are then pressed by steam presses.
