Monoazo and Isoindoline Yellow reactivity in presence of Pb, Ti, Zn-based white substrates

Agnese De Carlo, Valerio Graziani, Paolo Branchini, Luca Tortora

Abstract

This work explores the effects of accelerated aging conditions on two yellow synthetic organic pigments with good light fastness: PY 1 and PY 139 also known as Hansa Yellow G (or Monoazo yellow) and Isoindoline Yellow, respectively. The reactivity of PY 1 and PY 139 in presence of reactive inorganic whites such as basic lead carbonate, titanium oxide, and zinc oxide was investigated. The accelerated aging process was achieved through UV irradiation in a home-made climatic chamber for a set of bilayer paint mock-ups. Bilayered samples were realized to simulate the painting technique of superimposing multiple layers of thinly applied paint. Colorimetry, Fourier-Transform Infrared Spectroscopy, and Photoluminescence Spectroscopy were adopted to reveal physico-chemical changes occurred in such samples.

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IMEKO-MetroArchaeo-2023-092.pdf

DOI

10.21014/tc4-ARC-2023.092

IMEKO TC

TC4 - Measurement of Electrical Quantities

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