本文通过褐煤对五种染料溶液的吸附实验，表明褐煤对亲水性染料和疏水性染料均有脱色作用。
Through experiments made on the adsorption effect of brown coal on five types of dye, it is found that brown coal decolorizes not only hydrophilic dye but also hydrophobic dye.
由于聚丙烯纤维的这种化学惰性和极大的疏水性，使得用一般的染料染色难以获得满意的渗透性和染料在纤维内部的持久性，各项牢度均很差。
On account of the chemical inertia and huge hydrophobic about polypropylene, generic dye is difficult to dye the fibre and can only gain dissatisfiable permeability and poor permanence of dye.
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