1,351. More About Laundry During Shiva
211:6 If someone had to sit shiva twice, one right after the other, his clothes may be washed with water only - though not with detergent, soap, etc. - and he may wear them.
211:7 From the conclusion of shiva through the end of shloshim, one is technically permitted to have laundered clothes and linens, they just may not be ironed. Some authorities say that this restriction applies to clothes laundered with detergent. The practice is to forbid laundered clothes even without ironing unless another person wore the garment first for a short period. However, if the clothes were washed in water alone, there's no need for another person to put them on first.