My friends mum is a proffesional hairdresser, when she dies her fringe she uses ordinary kitchen foil and it works fineShe also put a streak in her hair using kitchen foil and that turned out amazing; it was really easy and neatThere was no mess on her scalp or anywhere else.
Bodies absorb just as well as they emit at any particular wavelength.? (If a body could have a difference in its ability to absorb and emit, you could put two different bodies at the same temperature in a mirrored chamber and one would spontaneously get warmer and the other one would get coolernot going to happen!)? You can make a body which is a good infrared mirror (the aluminized mylar Space Blankets are good examples of this) but it will also be a poor emitter and a poor absorber.
