CCAHA

    • 1822 Map, During Treatment (2)
  • 264 South 23rd Street  
  • Philadelphia, PA 19103
  • 
P 215.545.0613
  • 
F 215.735.9313

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Map of Western Hemisphere

Elizabeth Mount, 1822, 45 x 42.75"
Three Village Historical Society (Setauket, New York)
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    • 1822 Map, Before Treatment (1)
    • 1822 Map, Before Treatment (1)
    • The map before treatment

    • 1822 Map, Before Treatment (2)
    • 1822 Map, Before Treatment (2)
    • The paper support was locally separated from the secondary support of linen backing

    • 1822 Map, Before Treatment (3)
    • 1822 Map, Before Treatment (3)
    • The map had numerous tears and losses

This map, which is hand-drawn with brown ink and hand-colored with green and brown watercolor, was in extremely poor condition when it arrived at CCAHA.  There was extensive mechanical damage, including numerous tears and losses, overall.  The paper support was inflexible and very brittle, and it had separated from the secondary support of linen backing.  The map had an overall dark brown discoloration, due to a varnish coating, that was darker in the upper left quadrant.  There was moderate surface soil and random black spotty staining overall.

The primary support of wove paper had been lined overall to a linen backing and relined with additional linen cloth.  The map was attached with multiple nails along top and bottom dowels, but it had torn, leaving some paper remnants, and it had separated from the dowels.  The object was completely detached from the tertiary linen backing, which was still attached to the dowels.  There were two black strips along the left and right edges of the map, and some parts of the strips had been lost.  The object was varnished overall and had become moderately brittle due to aging.

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    • 1822 Map, After Treatment (1)
    • 1822 Map, After Treatment (1)
    • The map after treatment

    • 1822 Map, During Treatment (1)
    • 1822 Map, During Treatment (1)
    • Collecting paper remnants

    • 1822 Map, During Treatment (2)
    • 1822 Map, During Treatment (2)
    • Surface cleaning the map using a soft vulcanized rubber sponge

    • 1822 Map, During Treatment (3)
    • 1822 Map, During Treatment (3)
    • Soft vulcanized rubber sponge used to surface clean the map

    • 1822 Map, During Treatment (4)
    • 1822 Map, During Treatment (4)
    • Washing the object on a fabric surface

    • 1822 Map, During Treatment (5)
    • 1822 Map, During Treatment (5)
    • 1822 Map, During Treatment (6)
    • 1822 Map, During Treatment (6)

CCAHA conservators surface cleaned the map using soft vulcanized rubber sponges and a brush.  They removed the linen cloth using moisture while the object was face-down on rayon paper.  The adhesive residues were reduced using calcium-enriched deionized water, a brush, and cheese cloth.  The varnish coating was reduced using ethanol and a sprayer on a suction table.  Conservators then washed the map on a surface of non-woven fabric made of polyester and cellulose hydrospun saturated with calcium-enriched deionized water. The black strips were removed during washing.

After washing, conservators lined the map with acrylic-toned mulberry paper and an additional layer of mulberry paper using wheat starch paste. The map dried on a drying board.  Next, conservators further toned some areas of the lining paper with watercolor and inpainted minor media losses with watercolor and a brush.

After treatment, the map was encapsulated between sheets of clear inert polyester film sealed ultrasonically. To prevent the object from slipping within the capsule, mulberry paper V-hinges were attached to the top edge with wheat starch paste.  Strips of polyester film were attached to the hinges with PVA adhesive and wheat starch paste, and the polyester strips were then fastened into the top seam of the capsule with the ultrasonic welder.  Brass grommets were fastened into the top seam of the capsule to facilitate storage or exhibition.  Finally, the existing wooden dowels were attached to the top and bottom of the encapsulated map.