How do I remove black marks caused by ironing?

How do I remove such black marks caused by ironing?

The best way to do this is by using a solution of water and lemon juice. Mix equal parts lemon juice and cold water in a bowl and then use a clean white cloth to sponge the solution onto the affected area. Let it sit for 10 minutes before rinsing it off with warm water. This should help to remove any iron marks from your clothes.