Join Date: Jun 2013
Location: Gilbert, Arizona
Just use any spray or contact glue to adhere the dull side of aluminum foil to some posterboard. Then you can bend it into a parabolic type reflector.
Eric, whoever was saying that aluminum was a diffuser and not a reflector is out of their mind. All the light we see is reflected, and the less smooth the surface is the more the reflected image is blurred. The smoother the reflecting surface is, the less diffusion there is.
People are too often merely stating an assumed truth from flawed observation.