Stains on fabrics – Mould
Mould. Linen fabrics stained with mold are moistened with warm water and first sprinkled with ammonia, and then with a concentrated solution of potassium acid oxalate. After some time, the surface is thoroughly washed with water. If it detaches quickly, can be treated with dilute hydrochloric acid or hydrogen peroxide. Other whitening agents can also be used, like for example. bleach, potassium hypochlorite solution, etc.. It needs to be highlighted that, that hydrochloric acid and potassium hypochlorite damage the fibers of rayon rayon, polyester and polyamide fibers. Stained woolen fabrics, Natural silk and yarn are thoroughly washed with a detergent solution. Then they are sprinkled with formic acid (Test the acid on an inconspicuous part of the fabric). You can also treat the still wet stain with a little ammonium chloride or a salt solution with ammonia or a solution of ammonium carbonate. (be careful with fabrics dyed in an acid environment)’. Because mold decomposes dyes, you should take into account the possibility of light stains on the cleaned areas of the fabric. If mold stains appear on colored natural and artificial viscose silk, the stained areas should be sprinkled with a borax solution, then wash them thoroughly with clean water. Mold stains on sailcloth are removed with a brush moistened with a solution of potash and acid potassium oxalate.