I was going to say “I doubt it was instantaneous”… but I stand corrected
"They suffered slow oxidation giving way to humid saturation due to groundwater seepage for 2,180 years, followed by rapid oxidation and dehydration in 1974 when the vaults were opened and exposed to the atmosphere. The color coating was severely damaged, then aged and peeled off…
Practically every warrior and horse was painted, but having been buried for more than 2,200 years the pigments were so old they began to change just 15 seconds after they were unearthed. Within four minutes the painting layers bound together by pigments became dehydrated, tilted and broke from the surface.”
I was going to say “I doubt it was instantaneous”… but I stand corrected
"They suffered slow oxidation giving way to humid saturation due to groundwater seepage for 2,180 years, followed by rapid oxidation and dehydration in 1974 when the vaults were opened and exposed to the atmosphere. The color coating was severely damaged, then aged and peeled off…
Practically every warrior and horse was painted, but having been buried for more than 2,200 years the pigments were so old they began to change just 15 seconds after they were unearthed. Within four minutes the painting layers bound together by pigments became dehydrated, tilted and broke from the surface.”
Source