Exposure to sunlight is the primary cause of fading in oil paintings, as the ultraviolet radiation in sunlight can break down the pigments in the paint.

The ideal temperature range for storing paintings is 60-70 degrees Fahrenheit, as higher temperatures can cause the paint to become brittle and crack.

The ideal relative humidity range for storing paintings is 40-50%, as higher humidity levels can cause the paint to become moldy and deteriorate.

The best way to clean a painting is to use a soft, dry cloth. Mild soap and water solutions can be used on some paintings, but it is important to test a small area first to make sure the paint is not damaged.

Paintings should be inspected for damage at least once a year, as damage can occur over time due to factors such as exposure to light, humidity, and temperature changes.

Paintings should be stored in a dark, cool, and dry place, away from direct sunlight, heat, and humidity.

Paintings should be transported in a wooden crate that is lined with soft material, such as foam or bubble wrap.

Paintings should be hung using wire, as nails and screws can damage the painting.

Paintings should be framed using a wooden frame, as metal frames can rust and plastic frames can warp.

Paintings should be protected from dust and dirt using a glass or acrylic cover.

Paintings should be protected from moisture using a sealant.

Paintings should be protected from insects using a combination of insecticides, repellents, and traps.

Paintings should be protected from fire using a combination of fire extinguishers, smoke detectors, and fire blankets.

Paintings should be protected from theft using a combination of security systems, motion sensors, and cameras.

The best way to document the condition of a painting is to take photographs and write a condition report.