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 science clipart, logo clipart, love clipart, mailbox clipart, map clipart, marijuana clipart, martial arts clipart, masonic clipart, math clipart, medical clipart, medieval clipart, rose clipart, rugby clipart, safety clipart, santa clipart, scientific clipart, sewing clipart, sex clipart, sexy clipart, shamrock clipart, sheep clipart, shoe clipart, shopping cart clipart, spider clipart, sport clipartWhat 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 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 of high humidity (above 65% of relative humidity). Keeping artworks out of high humidity areas like bathrooms 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 to changes logoclipart in climate by expanding when it is humid and contracting when it is dry. A gentle undulation in the paper called "cockling" occurs under these conditions, especially with larger works. This may impair the work aesthetically logoclipart 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. 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 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 of high humidity (above 65% of relative humidity). Keeping artworks out of high humidity areas like bathrooms 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 to changes logoclipart in climate by expanding when it is humid and contracting when it is dry. A gentle undulation in the paper called "cockling" occurs under these conditions, especially with larger works. This may impair the work aesthetically logoclipart 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. online clip art
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