Aluminum reflectionapp

The difference between aluminium and white paper is that aluminium is glossy and acts as a mirror. Therewith is "shows" the darker objects in the surrounding which may appear as being darker.

Highly reflectivealuminumsheet

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well, I wonder why aluminium foil is poor at reflecting the light in comparaison of matte white paint. Is it the same for an aluminium mirror ?

He wrote, p46, "you shouldn't use aluminium foil because it's quite poor at reflecting light (...) A practical alternative (...) matte white paint, wich is 75-80 percent reflective"