This painting is in oil paint on an oak panel measuring 1143 x 819 mm (fig.1). The panel is composed of four vertical boards, glued together at butt joins. The width of the boards varies: from the left side they measure respectively 247–1259 mm; 240–277 mm; 48–59 mm; 235–261 mm. Overall the panel has developed a forward bow and has had a history of splitting in the two leftmost boards. The upper right area has old woodworm damage. The panel has a wooden cradle to help support the weakened wood (figs.2–3). It is recorded that the cradle was fitted in 1917 by Leggatt Brothers. The panel would have been thinned down from the back as part of the cradling operation; thus we have almost certainly lost the royal stamp that it should have had on the back, identifying it as part of the collection of Charles I.
The ground is made of powdered marine chalk (calcium carbonate) bound in animal glue (figs.4–5).1 It has a smooth surface. Infrared reflectography reveals that the ground is covered over with a grey, oil bound priming applied very thinly and streakily (figs.6–7). The thin priming is just visible as a line of black particles between the ground and the red paint in fig.4.
Underdrawn lines are visible to unaided eye at the sitter’s right shoulder marking outside edge of ruff (fig.6). More extensive drawing is visible in the full infrared reflectogram but it is not elaborate.
The artist appears to have begun the work of painting by laying in the background drapery with opaque tones of muted red around a reserve for the figure. The principal pigment there is vermilion, mixed with lead white, black and earth colours. The rest of the painting would have been laid in with similarly muted tones, for example, the features of the face were laid in with very thin, mid-brown paint, which would be left visible to form the delineating shadows, strengthened with deeper glazes (figs.8–13). The assured wet-in-wet handling of the flesh tones is matched in the background with glazes of translucent red paint, which vary in concentration and therefore hue (figs.14–20). Further shadowing is achieved with addition of black pigment (fig.21). The glazes were applied with bold, multidirectional brushstrokes using a coarse brush, all rapidly executed with much wet-in-wet intermingling of the different shades. The final highlights on top of glazing were done with opaque vermilion paint, sometimes mixed with chalk, lead white, yellow ochre, lead-tin yellow and pipeclay.2 The black dress appears to have been done with a mixture of bone black and ivory black with lead white. The red lake pigment is not madder (which would have fluoresced brightly in cross-section) but otherwise could not be identified.3 Analysis of the binding medium of a highlight in the curtain revealed only natural resin, with chalk used to give body to the paint.4
There has been very slight fading of the red lake glazing.
March 2021