Answer:
You can purchase some soft black linen or linen that is non transparent , but you need to know the actual measurements of where you'll fix your curtains. If you are a good tailor and you have the machine bring them home and fix them with the help of a sewing machine. If you are not a tailor you might look for one around your area. Tailors can be found near laundry marts and are less expensive. They will help you fix new curtains for your home.