Investigation into 20th century polychromed concrete modelled sculpture by Peter Laszlo Peri and assessment of efficacy of technical analysis on concrete substrates
In collaboration with Peter Laszlo Peri Estate, investigated the polychromy of his concrete sculptures made between 1930 - 1955 by taking raw samples and subjecting it to series of technical analysis including FTIR, XRF,XRD, Raman spectroscopy, and SEM EDX.
The study was able to determine set of palette including iron oxide red and yellow, carbon black, and phthalo blue. The pigments were bound in water diluted cement, portland cement in particular, or gypsum. Peri manipulated the consistency of the paint by the ratio of water to binder.
FTIR, Raman, and SEM EDX, as well as optical microscopy proved informative while XRF and XRD require larger sample size.
Woman in red hair (1945) and Portrait of a woman (1939) by Peter Peri
Top) Close up of polychromed surface
Bottom) Space construction with two figures (1955)
Red iron oxide Yellow iron oxide Phthalocyanine blue
Cross section sample example in
Left) white light
Top Left) UV light
Top Right) UV light with gypsum staining
SEM image of concrete sample
Example of Raman spectroscopy identifying phthalo blue