| abstract |
A method for surface preparation of solid substances by which the solid substances can be improved in the tight adhesion to coating films made from ultraviolet-curing resins or the like; and surface-prepared solid substances. The method comprises treating the whole or part of a solid substance with a flame of a fuel gas containing a specific silicon compound having a flash point ranging from 0 to 100~C and a boiling point ranging from 105 to 250~C, e.g., hexamethyldisilazane, vinyltri- methoxysilane, trifluoropropyltrimethoxysilane, or 3-chloro- propyltrimethoxysilane to conduct flame silicification. |