I studied this in Classical Archaeology back in 1975.
An excellent book by Joseph Deiss was one of our texts. It detailed the various little food shops all around Herculaneum, with photos of the lunch counters and even carbonized food that had survived a couple of thousand years under the lava flow.
MMM...carbonized...
“photos of the lunch counters “ -— Formica formed from Mica?
“...even carbonized food that had survived a couple of thousand years.” -— Now that was loaded with preservatives!