Varying humidity levels have visible effects on the surface of paintings and artifacts such as warping and cracking of the surface, discoloration of material, loss of surface material or the material becoming brittle and fragile. Excess moisture leads to mold, fungal growth and black spots on surface of paintings and leather. On metals it causes corrosion. These factors cause degradation of paintings and artifacts. Origin Dehumidifiers have proven to be the most effective solution in preserving paintings, collections and artifacts from any sort of moisture damage and has helps safeguard your valued collection for years together.