Kandyan silver inlay on blackened iron (Kadu Kapeema): damascene sword blade forging?

The manufacture of traditional Kandyan ceremonial swords (Kasthane) involves true damascene metal inlay (Kadu Kapeema). The single-edged blade is forged from local crucible steel, shaped, and polished. The smith uses a hardened steel chisel to score a microscopic cross-hatched grid (100 lines per inch) into the steel blade forte. Fine silver or 22k gold wire (0.1mm) is hammered into the steel grooves using a brass-faced punch; the undercut steel burrs fold over and lock the precious metal in place. The blade is treated with natural lime juice and sulfur paste to chemically blacken the steel base, creating high contrast against the gleaming silver arabesque scrollwork.