Sheet forming is generally accomplished on a 3-roller stack. If the desired final sheet thickness is less than 0.8 mm, the nip roller gap should be about 2/3 of the desired thickness. If the desired final sheet thickness is more than 0.8 mm (include 0.8 mm), the nip roller gap should be about 5/6 of the desired thickness.คำศัพท์เฉพาะทางเคมี