You will need
- - bleach;
- - salt and soda;
- - hydrogen peroxide.
Things made of cotton or linen can be boiled. For this purpose it is better to use purified water, benefit of it must not so much. Pour water into an enamel bowl (a bowl or bucket, add detergent and a little bleach, and put on fire to boil. Do not forget to stir. Once things let the sauce to boil for 30-40 minutes, well otbrosit them in clean water. But it's worth noting that after boiling the clothes may slightly shrink in size.
With each wash, add a bit of baking soda and salt. If you wash in the machine, that will suffice 2 tsp salt and 3 tsp. of baking soda. Of course, linen does not blanch the first time, but it gradually returns to previous form.
Soak the linen in cold water with oxygen bleach overnight. In the morning wash it by hand and rinse in clean water. To use for this purpose, the boiling water is not recommended, as bleach at high temperatures has a negative impact on the fibres.
Dissolve 2 tbsp of hydrogen peroxide in a liter of water and soak in the resulting solution linen. The bleach perfectly whitens and brightens fabric color.
At hardware stores sell special detergents for lingerie. Method of use described on the package. If you decide to use it, then first read all the guidelines, otherwise things may be permanently damaged.
To maintain the white appearance from underwear,, use the powder with optical bleach from leading brands. If you have dirty water (a yellowish tint), pre-boil and defend it. Then drain in a basin, and linen wash only in clean water by hand.
Do not attempt to bleach underwear citric acid. It gives a yellow tint to things. To use it is pointless.