Superseded90% confidenceFactTime unknown
魔力擦的本质是三聚氰胺泡棉，靠微米级硬质结构像超细砂纸一样物理打磨污渍，密度越高（约22kg/m³以上）越耐磨、单块清洁次数越多、掉屑越少；低密度（13kg/m³以下）擦几下就散碎
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Long-term
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This knowledge claim has been superseded by newer content
魔力擦本质是三聚氰胺泡棉，靠微观硬度像超细砂纸一样物理打磨去污，密度越高（手感越硬实）耐磨次数越多，低密度松软款擦几下就掉渣缩小Sources
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