Wikipedia
Panchaloha
Panchaloha ( Sanskrit: पञ्चलोह; Tamil: பஞ்சலோகம், ஐம்பொன்(aimpon); IAST: pañcaloha; ) (also called Panchaloham ( malayalam: പഞ്ചലോഹം) or Panchadhatu ( Sanskrit: पञ्चधातु, lit. five metals) a term for traditional five-metal alloys of sacred significance used for making Hindu temple idols ( Murti). Making Panchaloha images was a well kept secret for a long time.