1. Darker clothes Salt acts to keep the color from fading. So, it is good to soak dark clothes that are feared to fade in salt water for about 30 minutes and wash them. Put a handful of salt in a basin of water, wait for the salt to melt, and soak the laundry. It is especially effective for red and black clothes. For silk or wool, mix the neutral detergent in 1L of water in a ratio of 2g, and mi..