CONSERVATION MATTERS
Painting Conservation & Restoration 
Clare Herbert | MA Conservation | BA (Hons)
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To contact Clare Herbert, telephone +44 (0) 1453 886 445

Conservation Matters is based in Stroud, Gloucestershire, UK

Pastoral Scene by W. Gillard
Oil on canvas, 430 x 769 mm. Reproduced by kind permission of the owners
 
Treatment details

Tests were carried out to check the solubility of the paint, and varnish and for the paintings suitability for all the treatment processes to follow.  The painting was faced with tissue to protect the paint layer during treatment.  This was stuck to the front using dilute glue.

Facing tissue on the front of the painting

The facing tissue is torn into squares to make it easier to apply.

The painting was removed from the stretcher and cleaned.  As can be seen, a considerable amount of dirt has accumulated on the back, particularly where the stretcher bars were.

The canvas was first checked for its response to moisture to make sure there would be no adverse reaction. The distortions in the canvas were treated using moisture and weight.  The barely perceptible amounts of moisture encourages the canvas fibres to relax, and while drying the canvas is encouraged to re-conform by weighting it down. 

Not all the distortions were corrected and the painting underwent a further process called pre-stretching.  Pieces of damp paper are tested for their shrinkage characteristics.  Dampened strips of the chosen paper are carefully stuck to the canvas and also to a board.  While the strips are drying, they gently stretch the painting along all sides so mimicking the action of a stretcher.

The painting was then lined onto a new piece of linen canvas and the consolidation of the flaking paint was achieved at this stage.

The stretcher was checked for defects and the painting re-stretched onto the stretcher. The adhesive for the facing was dissolved and the facing removed.  Much of the dirt was removed with the facing. 

After an isolating coat of varnish (isolating fills and restoration form the original paint layer), the losses were filled and textured to match the surrounding paint.  On completion of retouching the painting was given a final coat of semi-matt varnish.

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Reverse of painting before treatment

The reverse before treatment

Dirt on the reverse of the painting

Dirt on the reverse of the canvas.

The painting undergoing weight treatment

The painting undergoing treatment to correct the distortions.

Pre-stretching the painting

Pre-stretching the painting

The painting after lining

The painting after lining while still on the lining loom.