Portrait of George Thomson
Unknown artist (possibly British), 1890-1910 or after, oil on canvas, 76 x 63 ½ cm
ANALYSIS:
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Multimodal imaging
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IRR
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X-ray
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FTIR
TREATMENT:​
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Consolidation
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Patch removal
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Humidification
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Varnish reduction
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Tear repair
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Varnishing
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Filling
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Inpainting
HIGHLIGHTS:
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Revealing underlying portrait via technical imaging
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Dating using canvas stamp
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Patch removal using rigid gels
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Addressing alkyd varnish and heat-damaged paint
Before and after treatment, normal illumination
Before and after treatment, raking illumination
Verso before and after treatment, backing board applied
A Second Portrait Underneath
Infrared reflectogram
Transmitted infrared
X-radiograph
A) Making gellan gum gel; B) Applying gel; C) Removing old patch; D) Patch removed
A) Old restoration removed; B) Tear repaired with canvas insert; C) Filled; D) After treatment
Detail of cupping and flaking paint, before and after consolidating and setting down with heat