| 摘要 |
A process for treating a surface to remove a coating from the surface employs an erasing agent comprising a plurality of particles, the particles comprising a precipitate or agglomerate of calcium carbonate. The process comprises the step of contacting the surface with the erasing agent such that at least some of the particles roll along at least a portion of the surface, wherein an angle of incidence of the particles and the surface is between 0° and 60°. The particles are generally round and have an irregular surface configuration to effect a rolling movement along the surface such that the particles rub and absorb the coating from the surface, and wherein the particles have an average maximum diameter of between 30 and 1000 microns.
|
