On the seventh day the priest shall reexamine it, and if the mildew has spread in the fabric, weave, knit, or leather, then regardless of how it is used, it is a harmful mildew; the article is unclean.
Jewish Publication Society of America Version (JPS1917) - Leviticus 13:51 >And he shall look on the plague on the seventh day: if the plague be spread in the garment, or in the warp, or in the woof, or in the skin, whatever service skin is used for, the plague is a malignant leprosy: it is unclean.