Stains on fabrics – Rust
Rust. Fresh rust stains can be removed in most cases with a concentrated citric acid solution. You can also moisten the stained area with water, sprinkle them with citric acid, leave this substance on the surface of the fabric for some time, then lightly rub it into the fabric. Older stains can be removed with an oxalic acid solution or with highly diluted hydrochloric acid. However, the possibility of serious damage to the plant fiber fabric should be taken into account. If we decide to undergo this procedure, it should be done quickly, then thoroughly wash off the stain remover. A known method is to remove rust stains with potassium acid oxalate. Where very large stains are involved, then an aqueous solution of potassium acid oxalate is prepared in proportion 5 g of this substance per 1 liter of water, then the entire fabric is immersed in it for a few minutes. After this bath, the fabric should be thoroughly rinsed in water. In the case of rust stains on natural and artificial viscose silk and on colored woolen fabrics, moisten the stained area with water, then wipe them with a solution of potassium hydrofluoride with the addition of a few drops of vinegar. Finally, the stained area is carefully washed with clean water. You can also purchase a ready-to-use rust stain remover from a specialist retail store.