We tried to recycle waste Tetra Pak cardboards, which contain aluminium as a step in the prevention of the environmental pollution caused by municipal solid wastes and as methods of achieving economical worth from these. The composite prepared with urea-formaldehyde resin was harder relative to that prepared with polyvinyl acetate based glue. The target cardboard density and thickness were 0.5 g/cm(3) and 3.0 cm, respectively. We were unable to obtain information on the effect of matrix: resin ratio on hardness of materials. Samples were easily damaged by water, suggesting that these materials were not suitable for use in high-humidity media. (c) 2006 Elsevier Ltd. All rights reserved.