Do not store or display works of art in areas of potentially high humidity or water leakage, e.g. basement, bathroom, outside walls, under pipes. Avoid areas where temperature and humidity fluctuate, or where there is inadequate air circulation, e.g. attic and places listed sport above. Do not hang artworks over or photos and pictures under radiators, heating and cooling vents, active fireplaces, humidifiers, and vaporizersA. The hygroscopic nature sport and photos of wood means that it will take water from the atmosphere and expand, but it will contract as the humidity lessens. The direction of shrinkage pictures is almost always around the circumference, which causes a solid piece of wood to crack vertically. Keeping sport it in a steady relative humidity can stabilize the sculpture; if the wood does not absorb or release moisture, it will no longer expand or contract.

What is the cause of dark spots photos that sometimes pictures appear on the paper of drawings and paintings? sport Reddish-brown photos spots are known as "foxing", caused by mold or the deterioration pictures of the metallic impurities left in the paper from the manufacturing process. Other colors of spots may be one sport of many types of mold damage. Mold spores are everywhere in the environment, and mold thrives on cellulosic materials, photos especially in conditions of high humidity (above 65% of relative humidity). Keeping artworks out of high humidity areas like bathrooms pictures or exterior walls, can help reduce the development of such stains. If I have a work of art on paper that appears to not be flat, should I be concerned? Paper is hygroscopic, reacting sport to changes in climate by expanding photos when it is humid and contracting when it is dry. A gentle undulation pictures in the paper called "cockling" occurs under these conditions, especially with larger works. This may impair the work aesthetically as well as cause mediums such as gouache to crack or flake as it is unable to expand and contract as the paper itself does.

Glazing can be sport either glass or acrylic. photos Only glass should be used with any friable media such as unfixed pastels, charcoals, or graphite, never acrylic as it pictures can damage the work by sport attracting these materials. There are many brands of acrylic glazing photos to choose from; one with an ultraviolet filter is recommended. The frame and the mat should be deep enough to prevent the artwork from touching the glazing. A stiff backboard behind the mat protects and supports the matted artwork. pictures It is best to use non-acidic boards. sport A dust seal with paper or tape is also recommended. What damage results from using poor quality mat board? Avoid mat boards containing wood pulp which causes "matburn"--a darkening of the paper photos under the mat or at the bevel cut pictures of the window mat. This type of stain permanently sport weakens photos the paper pictures fibers and is not easily removed or lightened in conservation treatment.

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