Adhesion Cohesion Changes
CrackingA break in a surface resulting in a visible separation of one part from another, extending through one or more layers.
COMMENT: COMMENT: Cracking is caused by the expansion and contraction of the layersaccompanied by a loss in elasticity. It can be the result of environmental fluctuations, vibrations, internal or external stresses or flaws in the surface. Cracking can be subdivided into: hairline cracks, microcracks (crazing), star cracks, aging cracks, radial or spiral cracks, craquelures, traction cracks, stretcher bar cracks, stress cracks or feather cracks.
LiteratureDuffy M., Martins A., Boon J.J., Metal soaps and visual changes ina painting by René Magritte, The Menaced Assassin, 1927, 2014, in: Issues in Contemporary Oil Paint, pp197-203
Helwig K., Thibeault M-E., Poulin J., Jack Chambers' mixed media paintings from the 1960s and 1970s: painting technique and condition, 2013, in: Studies in Conservation 58 (3), pp 226-244
Spring M., Higgit C., Saunders D., Investigation of pigment-medium processes in oil paint containing degraded smalt, 2005, in: National Gallery Technical Bulletin, vol 26, London, pp 56-70
Markevicius T. et al. , New approaches to an old problem: A precision mild heat-transfer method for nuanced treatment of sensitive contemporary and modern artworks, 2017, in: Postprints from the ICOM-CC 18th Triennial Conference, Copenhagen., paper 1308
Gridley M., Notes on the treatment of cracks in canvas paintings, 2014, in: AIC 42nd Annual Meeting, Paintings Specialty group postprints, San Francisco, pp 33-52
Gridley M., Cranmer D., Unforgiving Surfaces: Treatment of cracks in contemporary paintings, 2007, in: Modern Paints Uncovered: Proceedings from the Modern Paints Uncovered Symposium, Getty Conservation Institute, Tate and National Gallery of Art. , pp 143-148
Adhesion Cohesion ChangesBlistering