Cleaning Tips: Acids to Blue
Act quickly so that acid cannot damage the cloth. Sprinkle the stain with baking soda, dampen with water and allow to stand till bubbling stops. Rinse well in warm water. Alternatively, hold the dampened stain over an open bottle of household ammonia so that the fumes can neutralize the acid. Rinse well.
Sponge or soak the dry fabric stain with a suitable laundry pre-soak (spot stain remover) or in a grease solvent or kerosene. Kerosene will make the cloth oily, so if used, must be followed by washing in warm soapy water.
Always treat these as soon as possible. Often stains are almost colorless at first, but turn brown on standing, washing and ironing. Fresh stains can be removed by sponging several times with warm water. If there is any mark left, pour glycerine on the dampened stain, rub lightly between the hands and leave for half an hour. Rinse in warm water. More stubborn stains may be sponged on dry fabric with equal quantities of methylated spirits (wood alcohol) and ammonia (test on colors first) or laundry pre-soak (spot stain remover). Rinse well in warm water. If any stain is left on white material, a laundry bleach may be used. Choose and use your bleach according to instructions.
Alkali’s, such as washing soda and ammonia, or cuticle remover, may destroy color and rot material. Rinse at once in equal quantities of vinegar and water. Rinse well in warm water. If color has been affected this cannot be corrected.
See under Ink for stain removal suggestions
Rub some dishwashing liquid into the stain, leave for 10-15 minutes, then hot wash using your normal laundry detergent. If any stain remains, repeat the process. For unwashable fabrics or articles, see under Butter.
Treat immediately in copious amounts of cold water. For chlorine bleach, add 1 tbsp vinegar in each 20 oz water. If the color has been removed by the bleach, it cannot readily be restored, but try holding in fumes from an open bottle of ammonia.
If fresh, sponge with cool salted water (1 tsp : 600 ml water) and rinse with clear water. Should stain persist, soak in a diaper wash/sanitizer from the supermarket that contains sodium percarbonate – read the diaper wash/sanitizer label for the chemical make-up of the product (may state sodium carbonate peroxohydrate or oxygenated bleach). Sodium percarbonate is derived from a manufacturing process of concentrated solutions of sodium carbonate and hydrogen peroxide (sodium carbonate peroxohydrate) therefore you could try using the hydrogen peroxide suggestion first. Or you can try any of the following suggestions, and they are in no particular order. Dilute hydrogen peroxide (1 part : 9 parts water). Purchase the strongest solution available from a pharmacy – usually “20 Volume”. Rinse well. Sponge with a 10% solution of Oxalic Acid, warmed to about 115°F. Rinse well. Sponge with dilute ammonia (1 tsp : 600 ml). Rinse well. For thick or unwashable articles, e.g. mattresses, carpets, sprinkle with pepsin powder (from your pharmacy), or spread with a thick paste of raw starch and water, leave to dry, then brush off. Repeat if necessary.
Rinse fresh marks in cold water. Soak any more difficult stains in a solution 1 tbsp vinegar in 40 oz of warm water. Wash as usual.
Disclaimer: The information and our technical advice – whether verbal or in writing or by way of trials – are given in good faith, but without warranty, and this also applies where proprietary rights of third parties are involved. Our advice does not release you from the obligation to check its validity and to test products as to the suitability for the intended processes and uses.