Conservation is defined as remedial attention given to extend the life of a work of art. The process often reconstitutes missing material by additions. These additions may be either visible or invisible and serve to restore the work’s unity.
One of the most noticeable defects the public observes on a painted surface is craquelure. Craquelure appears as a minute crazing pattern on a painting’s surface. The following layers make up a painting:
1. Stretcher bars are covered by a canvas support
2. Canvas is coated with a sizing medium
3. Gesso (a ground layer) is applied over the sizing medium
4. Paint is layered over the sizing medium
5. Varnish is capped over all these layers
Ideally all these layers dry uniformly. When the harmony of these layers is disrupted, a problem results, requiring conservation. For instance, as the different layers absorb and release moisture, expansion and contraction take place. As the materials age, the ongoing process of change can take its toll. Vibrations when art is transported can be harmful to one or more layers, even though temperature and humidity are controlled....
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