Deteriorating Material
The chemical and/or physical changes due to the aging of a material used in an artwork that may also cause a visual change. These changes happen over time and may not be evident for years. This incudes yellowed varnishes or embrittlement of a canvas.
Example of deteriorating leather.
Collapsed hat due to deteriorated material.
Deterioration of canvas edges.
Delamination of elements due to degradation of adhesive.
Collapsed hat due to deteriorated material -During treatment
Paint deterioration due to prolonged exposure to sunlight.