The durability of an exterior finish is affected by the characteristics of the wood. Satisfactory finish life is usually more difficult to achieve on woods of higher density. All wood shrinks as it loses moisture and swells as it absorbs moisture, but some species are more stable than others. Species that. shrink and swell the most cause more stress on paint films than woods that are more stable. To this. end, let us recall that a painting on wood can be considered as a layered structure: The wood support. is coated with a number of superposed priming layers made from mixtures of gesso and glue. A frequent. fault resulting from such a system is the formation of detached regions inside the layered structure. caused by the shrinkage process of the wood support. Obviously, wood deteriorates more rapidly in. warm, humid regions with respect to cool or dry places. The influence of wood conditions on surface coatings is a critical point that should be monitored and that depends on environmental parameters such as microclimate. To prevent and control the effects, keeping costs down, a non-destructive. monitoring of wood support behavior under thermal stress is needed. In this work, an integrated. approach based on traditional and innovative (HI, PT and NIR) techniques was conducted on a primed support of poplar wood with a complex shape surface containing areas of artificial defects at. several depths due to the influence of the support on the various layers. The obtained results could be. arranged, if integrated into a multidisciplinary approach, in order to define and design the conservation of the wooden artifacts.

Integrated approach between Pulsed Thermography, Near-Infrared Reflectography and Sandwich Holography for Wooden Panel paintings advanced monitoring

S. SFARRA
;
AMBROSINI, DARIO;PAOLETTI, Domenica;
2011-01-01

Abstract

The durability of an exterior finish is affected by the characteristics of the wood. Satisfactory finish life is usually more difficult to achieve on woods of higher density. All wood shrinks as it loses moisture and swells as it absorbs moisture, but some species are more stable than others. Species that. shrink and swell the most cause more stress on paint films than woods that are more stable. To this. end, let us recall that a painting on wood can be considered as a layered structure: The wood support. is coated with a number of superposed priming layers made from mixtures of gesso and glue. A frequent. fault resulting from such a system is the formation of detached regions inside the layered structure. caused by the shrinkage process of the wood support. Obviously, wood deteriorates more rapidly in. warm, humid regions with respect to cool or dry places. The influence of wood conditions on surface coatings is a critical point that should be monitored and that depends on environmental parameters such as microclimate. To prevent and control the effects, keeping costs down, a non-destructive. monitoring of wood support behavior under thermal stress is needed. In this work, an integrated. approach based on traditional and innovative (HI, PT and NIR) techniques was conducted on a primed support of poplar wood with a complex shape surface containing areas of artificial defects at. several depths due to the influence of the support on the various layers. The obtained results could be. arranged, if integrated into a multidisciplinary approach, in order to define and design the conservation of the wooden artifacts.
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11697/89389
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