Abstract: A closure, particularly for use on liquid-packing containers, comprising a first substantially circular portion from the periphery of which a second substantially cylindrical portion projects substantially orthogonal to the first portion, the closure comprising a sealing system provided with a first sealing element associated with the first portion and second and third sealing elements associated with the second portion, the first, second and third sealing elements cooperating with the packing container. The first and the third sealing elements provide sealing by deformation when the closure is applied to the container. The second sealing element provides sealing by direct compression when the closure is applied to the container.

Abstract: A closure is described, particularly for use on liquid-packing containers, comprising a first substantially circular portion, from the end of which a second substantially cylindrical portion projects, which is substantially orthogonal to the first portion, the closure being characterized in that it comprises a sealing system provided with a first sealing element associated to the first portion and second and third sealing elements associated to the second portion, the first, second and third sealing elements cooperating with the packing container;

Abstract: The present invention refers to a process for whitening kaolinitic clays by adding an aqueous acid solution containing sodium bisulfite and atomized aluminum powder, thereby causing the reduction of the contaminating iron ions present in the kaolin, resulting in a considerable increase in its whiteness index as well as a reduction of the particle size of the product obtained.