substrate d is rinsed immediately after the woven cloth tape t is retracted from the glass substrate d by flowing a rinsing liquid on the surface of the glass substrate d without removing it from the texturing machine if a texturing machine as shown in fig1 is used the woven cloth tape t is pressed against the glass substrate d by means of a rubber roller p the durometer hardness of the rubber roller should be at least 60 degrees since line marks would not be formed on the surface of the glass substrate d if the hardness of the rubber roller p were too low the liquid suspension to be used for the purpose of this invention may be obtained by adding a solution containing hydroxyl groups such as koh and naoh solutions into an aqueous solution in which abrading particles are dispersed examples of abrading particles suitable for the purpose of this invention include particles of diamond silicon carbide alumina and zirconia with diameters in the range of 0 01 u03bcm 5 u03bcm which are commonly used for grinding and polishing the invention is described next by way of the results of test and comparison experiments carried out by the inventors in which glass substrates for magnetic disks were textured and the surface roughness after the processing was measured for the test experiment use was made of a woven cloth tape of thickness 75 u03bcm prepared by slicing a woven cloth comprising polyester fibers of thickness 1 0 denier into the shape of a tape the suspension was prepared by adding 5 weight of koh.