If the mildew disappears from the fabric, weave, or knit, or any leather article after washing, then it is to be washed again, and it will be clean.
Jewish Publication Society of America Version (JPS1917) - Leviticus 13:58 >And the garment, or the warp, or the woof, or whatsoever thing of skin it be, which thou shalt wash, if the plague be departed from them, then it shall be washed the second time, and shall be clean.