desilver
/dɪˈsɪlvər/Definitions
1. verb
to deprive of silver, especially by melting or alloying with another metal
“The process of desilvering old coins led to the loss of valuable metal.”
2. noun
the act of removing or depriving of silver, especially by melting or alloying with another metal
“The desilvering of the ancient statue revealed the underlying bronze structure.”