| 摘要 |
<p>A method of marking a substrate material comprising the steps of forming a recess (3) in a substrate (2), evacuating the recess (3) of debris to provide a keying surface in the base (4) and wall surfaces (5) and (6) of the recess, filling the recess (3) with a filler material (9) allowing the filler material to set and sealing the filler material (9) with a sealing compound such that the filler material creates a contrasting mark whose durability approximates or betters the durability of the substrate material.</p> |
