1, the stain must be treated on the spot, because it may not be easy to remove after a long time.
2. Decontamination is also orderly, that is, first use water, then use detergent (or deoiling), and finally use drugs to avoid damaging the scarf.
3, before using drugs to decontaminate, be sure to find out the material, otherwise using inappropriate drugs may damage the scarf.
4. When using hot water and detergent to decontaminate, if it is found that the effect is not ideal, it is better to increase the temperature of hot water than to continuously increase detergent.
5, decontamination, whether it is water, detergent or medicine, the cloth used to wipe the stain must be wrung out, otherwise it will make the stain more extensive!
8. If the decontamination treatment is improper, the stain will only expand slowly. The safer way is to grab the contaminated part and wipe it off, or put a cloth under the stain and pat it off.
9. After removing stains, avoid ironing with an iron immediately, because it will leave traces of dirt.
10, after using detergents, drugs, etc. You need to wash it again, otherwise it will damage the fabric or leave stains.
When it comes to oil stains on wool, especially stale oil stains, many people are helpless. After all, is there any way to remove stale oil stains from wool? The answer is yes.
Oil stains on wool can generally be divided into two categories: edible oil and mineral oil. Edible oils include soybean oil, salad oil, rapeseed oil, sunflower oil, peanut oil, animal oil and seasoning oil. Mineral oil includes petroleum series diesel oil, engine oil and paint.
Mineral oil: nonpolar hydrocarbons have surface tension with water, which means that a lot of energy is needed to force the oil-water interface to contact, so this kind of oil stains are removed by washing. Mineral oil has oxidation resistance and is easy to remove. But it is dispersed in clothes and soluble in organic solvents, especially halogenated hydrocarbons. Dry cleaning is usually easy to wash off.
Edible oil: derived from animal oil and vegetable oil, mainly fatty acids such as triglycerides, diglycerides and monoglycerides, fatty acids, etc. Very polar, but insoluble in water. Its physical state depends on the length and unsaturation of its chain. The longer the carbon chain is, the more saturated it is, and the larger its crystalline particles are, that is, the better its crystallization is, so the oil stain is more difficult to remove. On the contrary, on the contrary.
Amphotomy of wool fiber: in acidic solution, the carboxyl group of wool is not dissociated at all, but hydrogen group combines with proton to generate ammonium ion; In alkaline medium, amino groups exist in the form of free amino groups, while carboxyl groups are free into carboxyl negative ions.
Because there are free amino and carboxyl groups on the branches of wool, it is extremely polar. When protein, vegetable oil and other stains are encountered, the molecules also contain polar groups, and hydrogen bonding occurs, which makes the stains difficult to remove.
Effect of acid on wool fiber: the acid resistance of wool is greater than that of alkali resistance, and the dilute inorganic acid has little effect on wool, and it is also relatively stable to organic acids.
Effect of alkali on wool fabric: wool is very sensitive to alkali, and alkali washing will cause great damage to wool, because cystine in wool becomes lanthionine under the action of alkali. When the pH value of bath is higher than 10, the mechanical strength of wool decreases proportionally with the increase of bath temperature.
When the pH value is higher than 10, wool fiber is obviously damaged, its mechanical properties become worse, its color turns yellow and its sulfur content decreases. Strong alkali, such as sodium hydroxide and potassium hydroxide, can dissolve wool quickly, especially at higher temperature, and its dissolution speed is related to the concentration of alkali, and it can dissolve quickly in about 20% sodium hydroxide solution. After boiling in 2% sodium hydroxide solution for 5 minutes, wool completely dissolved, and protein became sodium amino acid salt, in which sulfur became sodium sulfide. It can react with lead acetate to produce black lead sulfide for detection. Alkali such as ammonia water and sodium carbonate has a mild effect, and trisodium phosphate is harmless to wool at 60~70℃.
Then here is a detailed introduction to the method of removing oil stains from sweaters: HTQ- heavy oil net can effectively remove oil, fat pigment, cosmetics, glue stains and so on. And can remove dry and stubborn stains such as mineral oil, animal oil, vegetable oil, asphalt, wax oil, nail polish, ballpoint pen oil, paint, inkpad, shoe polish, chewing gum, modifier, etc., especially suitable for oxidized yellow oil stains. The net pH value of heavy oil is 6-7, which is harmless to wool fibers and a mild detergent. After the stain is removed, if it is wet-washed, it needs to be emulsified and cleaned with detergent such as heavy dirt net.