| http://www.w3.org/ns/prov#value | - and analogous products and also, in particular, one or more thickening agents, which can advantageously be selected from the group consisting of silica, aluminium silicates, polysaccharides and their derivatives, e.g. hyaluronic acid, xanthan gum, hydroxypropylmethylcellulose, particularly advantageously from the group consisting of the polyacrylates, preferably a polyacrylate from the group cons
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