What is the significance of craquelure in old paintings and how does it affect the overall preservation and value of the artwork?

Craquelure refers to the fine cracks that appear on the surface of old paintings due to aging and changes in temperature and humidity. These cracks can add character and authenticity to a painting, enhancing its aesthetic appeal and historical value. However, extensive craquelure can also weaken the painting's structure and make it more susceptible to damage and deterioration. Conservators often work to stabilize craquelure to preserve the artwork's integrity and maintain its value.