| 摘要 |
Solid soiled materials are machine washed by withdrawing and recycling the wash liquor in contact with said solid soiled materials through a water-insoluble cation exchange polymer in particulate state having a calcium binding power of at least 2 mVal per gram, said polymer in particulate state being maintained out of contact with said solid soiled materials, for such time that the recycling wash liquor has passed through said polymer at least twice, in the presence of other soluble washing and cleaning compounds, while reversing the direction of flow of said wash liquor through said polymer repeatedly. |
