The indigo ink from some dark blue jeans can rub off onto shoes, purses, and furniture even after they have been washed numerous times. While some people may swear by using alcohol to remove ink stains, doing so may remove the dye from the leather and may actually damage the stained item. Since leather is a soft, luxurious, and often expensive material, only mild cleaning supplies should be used when trying to remove a stain.
Mix 2 cups of warm water and 2 tbsp. of clear dish soap in a small bowl.
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Dampen a soft cloth with the soapy water and wring it out to remove the excess.
Rub the denim stain with the damp cloth. You may have to apply some pressure to remove the stain, but don't rub too hard, because you may damage the leather. The dye will transfer from the leather to the cloth, so rinse the cloth periodically with fresh water, and dampen with the soapy mixture again.
Once the stain has been removed, give the leather one final rinse with a clean, damp cloth.