3. Aluminum support sheets

The products that are lacquered are aluminum strips, wound in coils, whose specifications are defined according to the end use.

• The most common grades are ordinary aluminum and manganese- and/or magnesium-based alloys (1050-1200-3003-3004-3005-5754).

• The initial metallurgical states of the aluminum or alloys are chosen with higher hardness characteristics than those desired, due to the heat treatment the metal undergoes in the paint baking oven (softening). Changes in the metal's structure are of no importance, only the increase in elongation has a favorable influence on deformation.

• Strip thicknesses generally range from 0.3 to 2 mm; widths vary from line to line, with some lines running up to 1,300 mm, others up to 1,500 mm;...