The effect of relative humidity and pigment type on paint films

Time-Dependent ATR-FTIR Spectroscopic Studies on Solvent Diffusion and Film Swelling in Oil Paint Model Systems

“…The trend in the values of solvent diffusion coefficients is similar to those determined by measurements of paint swelling on polymerized linseed oil films reported by Stolow . For water, the measured diffusion coefficients are of the same order of magnitude as the values reported for water diffusion in pigmented alkyd paints and vapor diffusion in historical samples of Prussian blue and basic lead carbonate paints (in the range (1.2–7.7) × 10 –13 m 2 /s).…”

“…This approach has been applied before to study single- or multicomponent solvent diffusion, − solute diffusion from an external medium into a polymer, , polymer chain interdiffusion, , and metal ion diffusion in ionomers . Diffusion and swelling by organic solvents − and water − in polymer blends based on linseed oil has been measured before using a variety of methods. For ionomers, data on diffusion and swelling are mainly limited to water and alcohols for fuel cell applications. − In most of these studies, polymer films are cast from solution (e.g., by spin-coating or dip-coating) directly onto the ATR elements as thin films to ensure a good contact.…”

Thermal Analysis

“…Thermal analysis has been used to study artistic materials (19) and especially the binding media of samples from paintings (20). A microcalorimeter was used to study honey and wax which played an important role in ancient Egypt (21).…”

Analytical study of accelerated light ageing and cleaning effects on acrylic and PVAc dispersion paints used in Modern and Contemporary Art

“…Nevertheless, other factors such as moisture content (or exposure to different relative humidity environmental conditions) or pigment volume concentration (PVC) can affect the mechanical properties of a paint sample [25,84,[96][97].…”

“…When the amount of pigment reaches a point named critical pigment volume concentration (CPVC), the pigment particles become poorly bound and the film starts loosing structural integrity. This is reflected in the mechanical properties, with resulting films above CPVC showing low strength and elongation at brake [42,83,[96][97][98].…”