Christopher W. McGlinchey

Thermal Analysis of Fresh and Mature Oil Paint Films: The Effect of Pigments as Driers and the Solvent Leaching of Mature Paint Films

The effect of titanium white, zinc white and lead white on the drying properties of poppy, walnut and linseed oil are analyzed by differential scanning calorimetry (DSC). All of the fresh films undergo complex thermal transitions between -100 and O°C. For some of the dried films subambient transitions that resemble glass transitions occur at about -30 O°C. After exposure to certain solvents, these sub-ambient transitions disappear or are reduced significantly. It is suggested that samples with diminished sub-ambient transitions become more brittle as a result of the loss of materials that act as plasticizers.

Lining Adhesives Used in Paintings Conservation, An Introduction

The lining process is described as a method by which a new cloth material is adhered to the back of a painting whose canvas is decayed to such an extent that it can no longer support itself. Due to the close relationship of the paint film to the canvas, the activation parameters employed in the lining process are at risk of changing the appearance of the paint film. The constraints the adhesive and adhering process must be activated under are discussed.