Currently available particle boards for furniture industry and interior outfitting with a density of more than 630 kg/m³ are too heavy for different applications. Therefore, the reduction of the density of particle boards by use of various light-weight fillers up to a range of 450 to 500 kg/m³ was investigated. Inorganic as well as organic filler materials were used in the middle layer to manufacture three-layered particle boards with densities in the area of 400 to 600 kg/m³ and thicknesses of 30 mm. The attained panel properties were compared to the requirements, as given in DIN EN 312 (2010), of particle boards of the P2-type – boards for interior fitments, including furniture, for use in dry conditions. Amongst others, positive results could be reached with extruded polystyrene, cork granules and expandable unexpanded polystyrene. The requirements concerning internal bond strength and thickness swell as for the P3-type could be met – with regard to bending properties partly not. Part 1 showed the current situation of lightweight panels as well as material and methods of experimentation. Part 2 shows selected results.