Abstract: A plate-component (1) which can be used for airborne-sound insulation has chambers (5, 6) filled with a pulverulent or granular, e.g. metallic material, whose chamber walls (2, 3, 4) at least partly are formed by a flexible material. Chambers (5, 6) are small in the vertical direction, but in the horizontal direction can form long channels. This construction not only leads to an increase in the sound insulation of a board joined to component 1 corresponding to an increase in the weight per unit area, but it is also possible to prevent coincidence breakdowns in the range 100-3000 Hz.

Abstract: A process for dyeing a voluminous flat form anionic dyeable substrate, for example a carpet, comprises applying locally to said substrate one or more dyes, optical brightening agents and/or reserving agents having low migration properties followed by pre-fixation of the same, subsequently dyeing the treated substrate in a short bath with one or more dyestuffs having better migration properties, rolling up the substrate and rotating the rolled-up substrate under conditions to effect fixation of the dyestuffs.