By
eHow Fashion, Style & Personal Care Editor
Difficulty: Moderately Easy
Step1
Prevent the black dye from bleeding. If you wash black jeans in hot water, you'll cause the black dye to bleed off the jeans. Use cold water instead.
Step2
Use a dark fabric wash. You can find detergent made specifically to protect the colors found on dark clothing. Woolite's Dark Laundry detergent is one such product.
Step3
Wash the black jeans with other dark clothing. If the dark colors of the other clothes bleed onto the jeans, they will appear darker and less faded.
Step4
Soak your jeans in black dye. If you notice the color of your jeans fading slightly, you can reverse the effect by soaking the jeans in a mixture of cold water and black dye for 15 minutes.
Step5
Allow the black jeans to air-dry. High-heat drying can contribute to fading. Dry your jeans on low heat, or hang them on a clothesline. If you do place the jeans on a line outside, keep them out of direct sunlight.