Specifies a composite product consisting of two outer layers of aluminium foil, usually with a core of kraft paper or other suitable material and/or fibre reinforcement. Two classes, two grades and two types are provided for, according to flammability index, grammage (mass per unit area), and provision or otherwise of an anti-glare surface. Physical property limits are stated and criteria of acceptability are given; values for resistance to delamination in both dry and humid conditions are included, as well as test procedures for the latter condition.