| 摘要 |
PURPOSE:To prevent abrasive unevenness, streaks, etc., from occurring as well as to improve lacquer ware in quality so better, by forming carbonic abrasive for lacquer ware, provided with a three-dimensional reticulate structure having continuous air holes, with a carbon porous body of a specific apparent density value. CONSTITUTION:A carbonic abrasive, provided with a three-dimensional reticulate structure having continuous air holes, absorbs abrasive swarf, chips, etc., into air holes whereby it prevents the occurrence of loading, streaks and the like attributable to residual abrasive swarf during continuous polishing operation. And, this carbonic abrasive is of glasslike carbon so that it is so conformable to hardness in a lacquer surface. Next, the glasslike carbon of a porous body constituting this carbonic abrasive is required to be within a range of 0.30g/cm<3> or 0.60g/cm<3> in its apparent density. At the manufacturing this abrasive, a partition wall of the carbon porous body consists of the three-dimentional reticulate structure having continuous air holes, composed of polyvinyl acetal resin and phenol resin and burned at a temperature of 800-1,200 deg.C under a nonoxidizing ambience.
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