For some people the thought of blackout curtains conjures up images of air raids, and imposed black out conditions during World War II. What may have begun as a safety device so that house would show no light and become a target for bombers has evolved into something quite different. Many people now advocate the use of blackout curtains as practical, energy saving, and perhaps noise-reducing window coverings. You will probably find blackout window curtains very useful if you have infants that you don’t want to wake up at the break of dawn, or if you are a night shift worker or student who pulls late night study sessions and wants to sleep late in the morning. Hotels use these curtains to blackout early morning light in the guest rooms so that guests are not be woken early.
Blackout curtain liners block light because they are generally made out of a heavy and tightly woven fabric. Most brands claim that their curtain will block out as much as 99 percent of daylight. You can generally find blackout window curtains in a variety of colors despite the name they are given which conjures up the image that they only come in black.