Pigment Hierarchies In The Roman World
I have been delving through this work
http://www.amazon.co.uk/Society-Pompeii-He...8&s=gateway
being a great lover of Pompeii and Herculaneum. As far as the social hierarchy of houses and their internal layouts go I have started a thread here:
http://www.unrv.com/forum/index.php?showto...amp;#entry43683
the changing styles of layout and decoration ,are intimate to the social upheavals of the period from the late Republic to approximately the death of Pliny The Elder. Indeed Pliny is a direct commentator on those very styles most acessible to himself in the city of Pompeii.
What is further interesting is the hierarchy of colours used by the aspiring Patron or Freedman in his home.The cost of pigments being the socially determining factor. Firstly, the most basic colouration is a limewash white, this is the very least that could be applied to a room-though a grand house might contain basic rooms with such colouration.
Cinnabar Red is the first major step into a luxurious environment, a painting contractor would charge a client directly for use of such a pigment (it is a sulphide of Mercury , HgS and associated with volcanic regions).
http://www.galleries.com/minerals/sulfides...ar/cinnabar.htm
Yellow ochre is another attested pigment , derived from clays and used as a general panel colour for rooms to be used for conspicuous display, as an iron oxide this will not have been rare ( rusty nails would do) but a consistent pure colour would need effort and application
http://webexhibits.org/pigments/indiv/over...ellowochre.html
http://www.unrv.com/forum/index.php?act=mo...=si&img=449
Then we ascend to blue , from lapis lazuli, very expensive and used only for the most exquisite of decorations: here we have the pigments displayed in the palette of the late , great John Davis of LEG II AVG
http://www.unrv.com/forum/index.php?act=mo...=si&img=907
http://www.gemstone.org/gem-by-gem/english/lapis.html
Finally black, was the colour for the grandest of state rooms, this may seem quite a strange circumstance to the modern historian, its weighty profundity is the key to its popularity in Roman sensibilities.This would be "bone black" or a high quality charcoal made from ivory (or possibly other dense bones), hence its inordinate cost.
edit note: no plant or animal will actually yield a true black , so the secret is in the mechanism of preparation with the blackest yielding items.
I must also offer one decorative motif that relates to specific servile areas of the house , especially where the house is not of the highest class( where physical separation would be near total) that is the device of zebra striped panels as a stark emblem contrasted with sumptuous decoration elsewhere.
http://www.uwm.edu/Course/mythology/0900/1501.jpg
A final item that must be mentioned is this , the division/colouration is not an artifice relating to privacy, indeed as far as I can see privacy is minimal ( I assume previous mention of the lack of Roman body shame is relevant here) however access to the intimate councils of the Paterfamilias is crucial. So all of this artifice is as regards degrees of intimacy of patronage , not zones of privacy within a building .An important clue here is that , if one stands in the entrance hall of many of the Pompeiian houses -you can see right to the very heart of the house with the Paterfamilias framed in his "seat of power" , though you might not be able to physically reach him if your status was too low, more clienti than amici...
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