1 cloth for white laundry. 1-2 cloths for colored laundry or rather a mixture of white and colored laundry (depending on the color intensity of the textiles). The effectiveness of dalli Dye & Dirt Catching Cloths cannot be guaranteed in case of significant amounts of dye due to non-colorfast laundry. So, always wash new, heavily color bleeding pieces of laundry at least 5 to 6 times separately.