Preservation of Works of Art on Paper
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Transcript of Preservation of Works of Art on Paper
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Preservation of Works of Art on
Paper& Examples of the Effects of
Improper Standards
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Basics for Preservation
Proper Care and Handling
Storage & Environment
Limiting Light Exposure
Limiting Exposure to Gaseous Pollution and Airborne Particulates
Controlling Temperature and Relative Humidity
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Proper Care & Handling
Work in dedicated surface space twice the size of the largest object
Handle paper objects as little and as gently as possible with clean/dry hands
Support documents in folders, mats, and boxes
Avoid sliding documents around on top of each other
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StorageStore matted works horizontally in acid-free boxes or in shallow map drawers
Matted works should have acid-free tissues between the window mat and drawing
Oversized objects should be stored flat whenever possible, not rolled or folded
Isolate highly acidic materials by storing them separately
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Limiting Light Exposure
Light damage is determined by wavelength of light, length of exposure, and intensity of illumination
Most paper items are susceptible to damage from ultraviolet (UV) and visible light
Damage is cumulative and irreversible
Fades watercolor and writing inks
Yellow, darken, and weaken paper
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Limiting Exposure to Gaseous Pollution and Airborne
ParticulatesPollutants from industrial gases, heating sources are absorbed by paper and can form compounds detrimental to the stability of the paper
Dust, soot, and soil are difficult to remove from porous surfaces
Indoor pollutants caused by computers and office machines, paints, installation, cleaning supplies can also degrade paper
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Controlling Temperature and Relative Humidity
Keep objects in a cool, dry environment. Maintain a temperature below 70 degrees with relative humidity between 30 and 50 percent.
Warm or moist conditions accelerate deterioration and encourage mold growth and insect activity.
Keep temp and rH within a narrow, constant range
Fluctuations in climate cause papers to expand and contract: structural weakening of paper, undermining attachments, and distortions such a buckling
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Examples from The National Gallery of Denmark of
unsuccessful or nonexistent preservation efforts
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Henri de Toulouse-Lautrec’ Lithograph Portraits of Yvette
Guilbert
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Before
After
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Michael Ostendorfer’s, illustration of deer hunting in the
Löss Forest, 1543, Woodcut
3 blocks
1 2 3
122 x 36 cm
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Before After
Peder Als Pastel Portrait of Queen Juliane Marie
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Johan Barthold Jongkind (1819-91), Landscape around the Drac River near Grenoble, 1880
Watercolor
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Iron Gall Ink
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Chalk & Pastel
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Charcoal