Rabbi Yochanan Eskenazi
There are five levels of aveilus (mourning) observed during the Hebrew calendar dates between the17th of Tammuz until the day after TishaB'Av. This period is referred to as Bein Hamitzarim or The Three Weeks. The closer to Tisha B'Av it gets, the degree of mourning intensifies. The halachos being discussed here are exclusively for the "The Nine Days", whichbegin at shkiyah (sunset) of Rosh Chodesh Av and continue thru the day after Tisha B'Av. It is important to note, all the restrictions of "the Three Weeks", which begin on Shiva Assur B'Tammuz are still in place.
One should not buy any type of new clothing (Rama 551:7) even if he does not plan to wear them until after Tisha B'Av (Mishneh Berurah 551:49). However, there are certain instances where one is permitted to purchase new clothing. This includes: purchasing for a newborn that has no other clothing; a sale item that will not be available after Tisha B'Av; someone travelling who is able to buy a specific item only in that place (Laws of Daily Living, The Three Weeks, pg. 67). Similarly, someone who forgot to buy non-leather shoes [for Tisha B'av] may purchase a pair (Igros Moshe OC 3:80).
Non-clothing items that are relatively inexpensive [e.g. pots and pans] may be purchased (Laws of Daily Living, The Three Weeks, pg. 69 quoting Harav Y.S. Eliyashuv, zt"l). Additionally, any items of necessity may be purchased (Igros Moshe OC 3:80).
One may not tailor or repair new clothing (Shulchan Aruch 551:7) even if the garment will not be completed until after the Nine Days (Mishneh Berurah 551:49). One may sew a tear, sew on a button and the like (Halichos Shlomo, Moadim 1: pg. 422, 22).
One may not launder clothing even if one will not wear it until after the Nine Days. Additionally, one may not give clothing to a laundering service or dry cleaners (Rama 551:3). According to some Poskim one may give clothing to a non-Jew [e.g. dry cleaners] during the Nine Days if one plans on wearing them only after Tisha B'Av (Mishneh Berurah 551:34). Included in garments are: clothing, towels, sheets, and tablecloths (Shulchan Aruch 551:3). It is permissible to polish scuffed shoes, but one may not shine them (Igros Moshe OC 3:80).
One may remove a stain from a garment even with water. (Laws of Daily Living, The Three Weeks, pg. 77 quoting Harav S.Z. Auerbach, zt"l and Harav Y.S. Eliyashuv, zt"l). Additionally, one may wash clothing for young children who constantly get their clothing dirty. One should not add in extra clothing [e.g. of an adult] while washing the children's clothing (Laws of Daily Living, The Three Weeks, pg. 80 quoting Harav Moshe Feinstein, zt"l). If one does not have any clean clothing, he may wash before the week of Tisha B'Av (Mishneh Berurah 551:29).