Pompeiian Pigments

Potentially of interest to someone … here’s the abstract (the article itself is payfer, of course):

Powdered pigments found in bowls from the Pompeii archaeological site and some wall-painting fragments from the Vesuvian area (conserved in the National Archaeological Museum of Naples) were investigated by microscopic Raman and FTIR spectroscopies, X-ray diffraction and scanning electron microscopy-energy dispersive X-ray. Brown, red and yellow pigments are common ochres based on goethite and haematite. The blue pigment is Egyptian blue: the presence of tridymite and cristobalite indicates firing temperatures in the 1000-1100 °C range. Pink pigments were prepared both with purely inorganic materials, by mixing haematite and Egyptian blue (violet hue), or presumably by adding an organic dye to an aluminium-silica matrix. A white powder found in a bowl is composed mainly of the unusual pigment huntite (CaMg3(CO3)4). Celadonite is found in the green samples from the wall paintings, together with Egyptian blue and basic lead carbonate, while the heterogeneous green pigment in a bowl shows malachite mixed with goethite, Egyptian blue, haematite, carbon, cerussite and quartz.

There’s a somewhat longer summary at Volcanic spectroscopy (not sure how that’s affiliated with the journal)

Leave a Reply

Fill in your details below or click an icon to log in:

WordPress.com Logo

You are commenting using your WordPress.com account. Log Out /  Change )

Google photo

You are commenting using your Google account. Log Out /  Change )

Twitter picture

You are commenting using your Twitter account. Log Out /  Change )

Facebook photo

You are commenting using your Facebook account. Log Out /  Change )

Connecting to %s