silica in the cleansing agents according to the invention of type a and type d cu abrasion values in the range of 11 18 mg of cu can be obtained made to measure depending on the composition of the recipes in respect of abrasive component and thickening component even in the extreme case where only abrasive component is used the ribbon stability remains good however it is found that the cu abrasion values increase far from linearly with the concentration of the abrasive component while on the other hand the abrasiveness of the dental care compositions according to the invention can be selected within relatively wide limits without having to sacrifice other important properties of the composition such as ribbon stability and separation stability this is not true when using the commercial cleansing agent type e based on silica gel table no 9__________________________________________________________________________opaque dental care compositions double function of cleansing agents recipes contain precipitated silicas having a thickening__________________________________________________________________________action consecutive no recipe 1 2 3 4 5 6 7 8 9 10__________________________________________________________________________distilled water 33 40 u2192 u2192 u2192 u2192 u2192 u2192 u2192 u2192 u2192 dehydazol a 400p 1 00 u2192 u2192 u2192 u2192 u2192 u2192 u2192 u2192 u2192 solbrol m 0 15 u2192 u2192 u2192 u2192 u2192 u2192 u2192 u2192 u2192 saccharin na 0 05 u2192 u2192 u2192 u2192 u2192 u2192 u2192 u2192 u2192 sorbitol 30 00 u2192 u2192 u2192 u2192 u2192 u2192 u2192 u2192 u2192 glycerol 10 00 u2192 u2192 u2192 u2192 u2192 u2192 u2192 u2192 u2192 tio sub 2 rn 56 0 40 u2192 u2192 u2192 u2192 u2192 u2192 u2192 u2192 u2192 liquid paraffin 0 50 u2192 u2192 u2192 u2192 u2192 u2192 u2192 u2192 u2192 aromatic oil 0 50 u2192 u2192 u2192 u2192 u2192 u2192 u2192.