Question: What are the rules concerning purification of impurity? Is there a prescribed number of washings required to remove impurity?
ANSWER
In the Hanafi Madhhab it is fard (compulsory) to wash impurity (najasat) if its amount is more than a dirham, that is, more than 4.8 grams. There is no prescribed number of washings required to remove impurity. One should wash it until it becomes clean.

When solid impurity is on a belt, a bag, khuffs or shoes, it can be cleaned by rubbing or wiping. Solid or fluid, any impurity on things not absorbent, but smooth and shining, such as glass, mirrors, bones, nails, knives, painted or varnished furniture, becomes clean when it is rubbed with the hands, soil, or any clean thing until it loses three qualities (color, odor, and taste).

It is not necessary to dry or wring jugs, bowls, and copperware that do not absorb impurity or anything washed under a tap.

When dried semen is rubbed off its place, the skin or the garment becomes clean. If the semen is wet, the clothes or the skin (on which it is) must be washed.

There are also scholars who say that it is fard to wash off even a drop of wine, so one should be on the safe side.

Purity is the default assumption about all things. Unless it is known for certain that something is stained with impurity, it cannot be considered impure upon supposition. The meat of animals butchered by the People of the Book is regarded as clean unless there is evidence to indicate otherwise.

Grape juice is clean. It becomes impure when it turns into wine. Wine becomes clean when it changes into vinegar.

Even if the impurity on one’s hand is little, it is fard to wash it off.

In the Hanafi Madhhab, as there is difficulty in cleaning the urine of cats and mice off clothes, it is excusable even if the amount is more than a dirham.

A fabric dyed with impure dye becomes clean when it is washed three times.

One’s things smeared with urine should be washed in a washing machine with clean water several times until one guesses they have become clean. If they become clean after being washed once, it will be enough. The other things in the machine will not become impure during the washing. Those who are over-scrupulous and dubious must wash them three times and squeeze the water out after each washing.

Things that cannot be squeezed because they are rotten, thin or big, such as carpets and leather that absorb impurity, must be dried after each washing. That is, one must wait until the water stops dripping.

A hide tanned with impure oil becomes clean when it is washed three times and wrung after each washing.

Only the skin of a fowl not disemboweled becomes impure when it is put in water that is not boiling; if the fowl is washed three times with cold water after being plucked and disemboweled, the entire fowl becomes clean again. Similarly, tripe becomes clean when washed three times in the same manner.

When a diaper soiled with urine is washed under a tap three times, it becomes clean.

Question: I washed the bloodstain off my garment, but I could not remove its trace (some color). Does it affect the validity of salat?
ANSWER
It is enough to wash it three times. After three washings, the existence of its color is not important, so it does not affect salat. The same rule applies to impure substances that contain coloring pigments. If the color of an impure substance on a garment cannot be removed even though it has been washed, it will not be a barrier to salat.