Description
This category includes damage that extends beyond the paint and preparatory layers and affects the wood. The damage is often visible from both the front and rear views, although restoration work may obscure the damage when viewed from the front.
Splits indicate damage to the wood that is directly associated with the joins between panels; disjoins indicate damage associated with separation between the individual boards that make up the panel painting.
Description
This category of minor crack includes only isolated cracks (that is, those not in a network) that originate at the edge of the visible panel as viewed from the front.
Description
This category of minor crack includes only isolated cracks (that is, those not in a network) that are located in the spandrels and do not originate at the edge of the visible panel as viewed from the front.
Description
This category of minor crack includes only isolated cracks (that is, those not in a network) that are located within the portrait ovals as viewed from the front.
Description
A series of connected cracks are considered to be a network. This category of crack includes connected cracks that are both large and located within gilding as viewed from the front. Large island networks are those that are longer than 5mm and that have islands that are on average larger than 2mm.
Description
A series of connected cracks are considered to be a network. This category of crack includes connected cracks that are small and located within gilding as viewed from the front. Small island networks are those that have islands that are on average no larger than 2mm.
Description
A series of connected cracks are considered to be a network. This category of crack includes connected cracks that have an overall vertical orientation and are located within the portrait oval as viewed from the front. The overall vertical direction indicates that these cracks will typically follow the grain of the wood.
Description
A series of connected cracks are considered to be a network. This category of crack includes connected cracks that appear to be associated with the movement between the frame and panel as viewed from the front, and do not extend into the spandrels or portrait ovals.
Description
A series of connected cracks are considered to be a network. This category of crack includes only those associated with the oval decoration found on each panel, marking the delineation between the gilded spandrels and the oval portraits. Note that cracks in this category do not necessarily follow the grain of the wood.
Description
A series of connected cracks are considered to be a network. This category of crack includes only those those found only in the spandrel decoration. Note that the networks in this category appear amorphous, and do not appear to follow the grain of the wood.
Description
This category of delamination includes only that which has occurred between the blue paint layer of the spandrels and the later preparation layer associated with the spandrel gilding.
Description
This category of delamination includes only that which has occurred within the preparatory ground layer of the later gilding within the spandrels.
Description
This category of delamination includes all areas of paintings where wood is clearly exposed in high-resolution imaging.
Description
This category of delamination includes those instances in which a dark paint layer was visible, often located along the intersection at which the front of the panel meets the frame.
Description
This category of delamination includes those instances that display clear past delamination, which has been retouched, obscuring the ability to determine the layers between which the delamination has occurred.
Description
This category includes all examples of tenting, where delaminated layers around cracks are raised in a pattern of peaks.
