How to Identify a Forgery by Suzanne Bell

Author:Suzanne Bell
Language: eng
Format: epub
Publisher: Skyhorse Publishing
Published: 2013-01-01T05:00:00+00:00

DATING INKS

Some of the issues that analysts often face when examining documents or similar evidence are the age of the document and whether the document was created at one time and altered at a later time. Art painted by Leonardo da Vinci would have to be created during his lifetime, for example. People who investigate art and art forgery study canvases, paint compositions, and varnishes to determine if they are authentic to the period in which they were painted. The paint must dry, which sounds obvious. Dry to the touch is different from dry in the chemical sense. Paint is dry when all of the solvent used to carry the pigments is gone and the polymer coating has completely formed. This can take months or years, depending on the type of paint used. Art investigators can also study the painting to see if the materials have aged as would be expected for a painting that is nearly 600 years old. The ingredients in paint age, as anyone who has painted a porch or house knows. This aging is also called weathering, and much of it is caused by exposure to ultraviolet radiation (UV). This occurs even if the painting is kept indoors. Other factors that contribute to weathering are microorganisms, such as bacteria and mold, and moisture that slowly deteriorate the material. Old paints and paintings tend to crack and fade in a way that fresh paint does not, which is one of the most powerful tools available to art experts and art historians.

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