Why are the two sides of Aluminum sheets(meant for household use) different?
*Commercial aluminum foil ranges in thickness from 0.00017 to 0.0059 in. and in width from 0.250 to 61 in. It is produced with two sides bright or one side bright and one satin finished. The latter, common for thickness less than 0.001 in., is produced by pack rolling: Two sheets of foil are passed through the rolling mill at the same time. The faces in contact with the rolls have a bright, specular finish, while the mating faces have a satin finish. Foil more than 0.001 in. thick is normally rolled in single sheets and is available with two sides bright. *If one sheet is passed through two rollers, then it will be having a bright,specular finish as both the faces will come in contact with rollers which are hardened and having 3 delta finish.
