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A laundry ball or washing ball is a product that is promoted as a substitute for laundry detergent. Producers of laundry balls often make pseudoscientific claims about how these balls work and exaggerate the extent of their benefits.〔〔 In the USA as of 2008 the product is often sold on home shopping channels or by participants in multilevel marketing, although this is not the case in all countries. While many individuals report that these balls work, most test results show them to be similar to or less effective than washing in water without any detergent.〔 Most of the effect can be attributed to the mechanical effect of the ball or to using hot water instead of cold water.〔〔 One of the tests comparing washing with water alone, laundry balls and a branded washing powder showed little difference in effectiveness between the three, and concluded "I'm not saying you need laundry balls or disks. But the soap makers' dirty little secret ... is that you might not need conventional detergent either."〔 The Federal Trade Commission has taken action against some of the manufacturers of these products because of their misleading claims.〔See, for example: (Marketers of Laundry Detergent Substitutes Charged with Making False and Unsubstantiated Claims Agree to Settlements with FTC and Eleven States ) and (Dallas Marketers of Laundry Detergent Substitute Charged with Making False and Unsubstantiated Claims Agree to Settlement with FTC and Six States ), Federal Trade Commission〕 Consumer organizations from several countries have recommended against buying this type of product. ==Types of laundry ball== There are several shapes of laundry balls: laundry disks, globes, spheres or doughnuts.〔〔 Some of the balls carry components inside, like ceramic pieces, magnetic material or coloured liquid that is claimed to be "activated water".〔〔 Manufacturers claim that these components have certain effects on washing efficacy, although studies don't show any difference between the different types of balls.〔 Some balls can be refilled with pellets of special detergent, or other ingredients.〔〔 抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』 ■ウィキペディアで「Laundry ball」の詳細全文を読む スポンサード リンク
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