How do humidity and dew affect the dimensional stability of canvas?
Humidity and dew significantly affect the dimensional stability of canvas, often causing warping, stretching, or shrinking. Canvas, typically made from cotton or linen, absorbs moisture from the air, leading to expansion in high humidity. Conversely, in dry conditions, it contracts. Dew introduces sudden moisture, which can unevenly saturate the fabric, resulting in distortions. Over time, repeated exposure weakens the fibers, compromising the structural integrity of paintings or fabric-based artworks. To minimize damage, store canvas in controlled environments (40-60% relative humidity) and avoid direct contact with moisture. Proper priming and sealing also help reduce absorption, ensuring long-term stability.
