Boeijink, Boekel, Van der Knaap Painting conservation studio

Problems with layers of varnish, paint and ground.


There are several causes for delamination of varnish, paint and ground from the underlying layers or from the stretcher, for example by mutation of moisture through the canvas and the layers of ground and paint. Another example might be shrinkage of the panel, causing the old layer of paint and ground, having lost its flexibility, to be squeezed together and come loose from the panel.

cross section of a painting on canvas

cracking, craquelure, cracks in the ground and paint layer
cracking, craquelure - cracks in the ground and paint layer


Example cracking, craquelure, cracks in the ground and paint layer
example of craquelure
cupping of paint and ground layer, deforming of paint layer and delamination of the edges
cupping - sections of the paint and ground layer are deforming and the edges are delaminating followed by lifting


Example cupping, sections of the paint and ground layer are deforming and the edges are delaminating followed by lifting
example of cupping with delamination of edges
cupping, sections of the paint layer are deforming, the canvas goes with concave deformation of the paintlayer
cupping without delamination - sections of the paint and ground layer are deforming causing the canvas to follow this concave deformation


Example cupping, sections of the paint layer, ground layer and canvas are deforming.
example of cupping
blisters, delamination of paintlayer caused by heat
blisters - delamination caused by heat


Example blisters, delamination of paintlayer caused by heat
example of blisters
flaking, the loss of big sections of the paint layer
flaking - the loss of big sections of the paint layer


Example flaking, the loss of big sections of the paint layer
example of flaking
flaking, the loss of sections of the paintlayer
flaking - the loss of sections of the paintlayer


Example flaking, the loss of small sections of the paintlayer
example of flaking
tenting, lifting up of paint from a textile support into a tent shape caused by shrinkage
tenting - lifting up of paint from a support into a tent shape


Example tenting lifting up of paint from a textile support into a tent shape by shrinkage of the canvas during low humidity
example of tenting
tenting lifting up of paint from a wooden support into a tent shape caused by shrinkage of the wooden panel
tenting - lifting up of paint from a support into a tent shape


Example tenting lifting up of paint from a wooden support into a tent shape caused by shrinkage of the wooden panel
example of tenting
delamination of the varnish - loss of sections of the varnish layer
delamination of the varnish - loss of sections of the varnish layer


Example delamination of the varnish - loss of sections of the varnish layer
example of varnish delamination
dent caused by pressure from the backside with flaking and loss of paint
dent caused by pressure from the backside with flaking and loss of paint


Example dent caused by pressure from the backside with flaking and loss of paint
example of dent
flaking of sections of the ground layer on textile supports
flaking of sections of the ground layer - textile supports


Example flaking of sections of the ground layer of textile support
example of flaking
textile support
flaking of sections of the ground layer on panels
flaking of sections of the ground layer - panels


Example flaking of sections of the ground layer on panel
example of flaking groundlayer
wooden panel
Conservation studio
Tingietersweg 87
2031 ER Haarlem

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