pure? what does it mean?

Transmission #280 from RASR-2 (UNCLASSIFIED)

Nakamura Hôchû, Korin gafu, “An Album of Pictures by Korin.” The first of the major Rimpa books. Illustrations copied by Hochu from Korin. Late 18th century.

source

"Rovasenda dove"

A Roman dove-shaped 'unguentaria' dated 1st century AD.

The object, approximately twenty centimeters long, is striking for its elegance and its function: it was intended to contain essences and balms. To use it, the tail had to be broken, as is done today with a single-dose vial.

This specimen, however, has never been opened: inside, it still retains half its contents, a clear liquid with a slight pinkish deposit. An absolute rarity, which makes the "Rovasenda dove" a sort of time capsule.