| abstract |
The present invention is a non-black, inexpensive, easy to obtain, lubricating paint based on calcium sulfate having excellent lubricating performance as a solid lubricant, even during thinning due to surface expansion and ironing of steel materials in plastic working. It is an object of the present invention to provide a new technology in which a sufficient amount of organic lubricant and solid lubricant maintain microscopically uniform function. The solid lubricant of the present invention is characterized by depositing fatty acid calcium salts on the surface of calcium sulfate crystals. |