Washing a pair of black jeans sounds easy, but care must be taken. Dark clothes tend to fade in the washing process. Black jeans are no exception. Preventing dark clothes from fading in the washing machine is possible; your black jeans can look like new for many months to come.
Turn your black jeans inside out before putting them in the washing machine.
Soak your black jeans in a bucket of water and 240 ml (1 cup) of vinegar. The vinegar sets the colour in the jeans.
Wash your black jeans with other black clothing items.
Set the wash and rinse cycles both to cold water. Cold water keeps the fabric colour from bleeding.
Add a tablespoon of black fabric dye to a bucket of cold water. Soak your black jeans in the dye mixture. Let them dry and then wash them in cold water. Occasionally adding colour to your black jeans will keep them looking like new.
Try not to wash your jeans often. If you can keep them clean while wearing them, hold off on the wash. Get a few wears in before washing and the jeans will hold up longer.
Do not keep your black jeans in the dryer for the full cycle. The drying process weakens the fabric and black jeans will look dingier, quicker. Take them out when they are still damp and hang them outside on a clothesline.