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    soaps and cleaners

    配方类型: ELEMENTARY Preparations
    配方说明: soaps are made fron a fat or fatty acid and an alkali. they
    lathetr and produce a foam which entraps dirt and grease. there are
    many kinds of soaps.
    cleaners contain a solvent, such as naphtha, with or without a soap.
    abrasive cleaners are soap pastes containing powdered pumice, stone,
    ailica, etc.
    配方组成: water/19
    immersion.
    immerse the part of the fabric with the rust or ink spot
    A) ammanium sulfide solution/1
    water/19
    alternately in solutions A and B , rinsing with watet after each
    rust and ink remover
    B) oxal8c acid/1

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