I was told that soaking your new black shirt(100% cotton) in vinegar will help it from fading when you wash it

We all have had that favorite dark colored shirt that fades and ends up with a ';frost'; of fade on it. Next time you buy dark (or bright) colored clothing, set the color by soaking the garment for an hour in a mix of 1/2 cup vinegar, 1/2 tablespoon of salt and 1/2 gallon of water. If the rinse water shows color after an hour, repeat the process. Use this technique only for single-colored items, because multi-colored items may bleed into each other. Multicolored items will likely need to be dry-cleaned. The clothing will still fade, but after many more washes. This will also prevent already laundered items from fading even more...I was told that soaking your new black shirt(100% cotton) in vinegar will help it from fading when you wash it
vinegar can help to set the dye which prevents it from bleeding out and looking faded.I was told that soaking your new black shirt(100% cotton) in vinegar will help it from fading when you wash it
wash you shirt and then hang it inside out and it will not fade.
This is true...I did a science fair experiment on this when I was in grade 8 or 9 i think...i'm 31 now so that wasn't yesterday lol