Depletion Gilding Coloring the Gold . Surface rich in gold. Remove base metals from the surface, which is enriched in gold.
{"Image DocumentName": "Depletion Gilding Coloring the Gold . Surface rich in gold. Remove base metals from the surface, which is enriched in gold.", "Image ImageDescription": "Process: conversion of base metals near the alloy surface: Chemical attack (alum and common salt), applied to Guanin (silver-rich). Form silver and copper chlorides, which at high temperature are absorbed by the crucible (cementation) Oxidation/leaching, applied to Tumbaga (copper-rich) Modern Method: Chemical Bombing Hot cyanide solution + hydrogen peroxide.", "Image XResolution": "37", "Image YResolution": "37", "Image ResolutionUnit": "Pixels/Centimeter", "Image Software": "SlidePlayer", "Image YCbCrPositioning": "Centered"}