Surely you have encountered the fact that some things change their color.
After this, regular washing no longer helps: the clothes take on a yellow or gray tint.
Some people use bleach, but things quickly deteriorate and wear out after that. So you need to find a more delicate washing option.
You will need to take a large saucepan in which you can place things. Pour in water. Then add shavings of one bar of laundry soap. It is best to use a more concentrated option.
Next, add a spoon (table) of soda. Calcined soda will do the job perfectly. Then you need to add two spoons of vegetable oil.
The indicated proportions are calculated for ten liters of water. Bring the solution to a boil and make sure that all the indicated ingredients are dissolved.
We send the clothes. Then we use the lid and leave it overnight.
In the morning, all that's left to do is to wash your white clothes and evaluate the results. After such bleaching, your clothes look literally new.