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What is the cause of dark spots that sometimes appear on the paper of drawings and paintings? Reddish-brown spots are known as "foxing", caused by mold or the deterioration of the metallic impurities decorative and wall left in the paper from the manufacturing process. Other colors of spots may be one of many types of mold damage. Mold spores are everywhere in the environment, and mold thrives on cellulosic materials, especially in conditions art of high humidity (above 65% of relative decorative humidity). Keeping artworks out of high humidity areas like bathrooms or exterior walls, can help reduce the development of such stains. wall If I have a work of art on paper that appears to not be flat, should I be concerned? Paper is hygroscopic, reacting art to changes in climate decorative by expanding when it is humid and contracting wall when it is dry. A gentle undulation art in decorative 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.

Once wall a wooden sculpture has been dehydrated cracks will appear, where even exposure art to high relative humidity will not make the cracks close up entirely. However, conservators can fill the decorative cracks with a variety of materials to create a unified visual wall impression. What should I ask for when matting and framing works of art art on paper? Mat board should be made from 100% rag or lignin-free cellulose. Sometimes those labelled as "museum board" or "conservation board" are not of the highest quality. Alkaline buffered boards are not sufficient if the board contains wood pulp. Photographs should not be matted decorative with alkaline buffered boards as some prints are adversely effected wall by alkalinity. Hinges are used to attach the work of art to the backboard of the mat. They should be made of Japanese art paper, and should be adhered with wheat starch paste. Pressure sensitive adhesive tapes and pre-gummed tapes should not be used. Photographs are often attached to the mat with photo corners.



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