Conserving the Gan Ku Tiger scroll painting
In 2007 the Gan Ku Tiger painting was chosen for a
collaborative conservation project between British Museum
conservators and the Renmei Scroll Mounting Federation in
Japan.
The painting was in good condition but it was
coming away from its backing, which is a threat to the painting
itself and meant that it could not go on display. Full conservation
of a hanging scroll involves removing the silk surround and the
supporting layers of Japanese paper that give the painting strength
and flexibility. During conservation the silk painting is therefore
very vulnerable and requires a team of experienced specialists.
A large-scale and delicate conservation
project was undertaken in the Museum’s Hirayama Studio, which
specialises in the conservation of East Asian paintings on paper
and silk and is the only one of its stature in Europe. Working
together with conservators from the Renmei studios in Japan
(studios designated by the Japanese government to work on paintings
with National Treasure status), the Museum’s conservators
completely remounted the scroll.
Initial investigations confirmed that the
painting and lining papers were detached in many areas. The mount
style and format were also found to be inappropriate for such a
prestigious painting and needed to be replaced. The size of the
painting added further challenges to the treatment.
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The Gan Ku Tiger scroll painting before conservation
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Filtered water is sprayed onto the painting to dissolve old adhesive and paper degradation products
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The old lining on the back of the painting is removed
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The new lining is applied to the back of the painting
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Silk fabrics from Japan are selected for the new mount
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The mount is assembled and lined silk fabrics are adhered with wheat starch paste and the join hammered through protective paper
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Backing is pounded onto the painting using brushes
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A roller rod is attached to the bottom, and another rod attached to the top, with cord so that it can be hung
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The finished scroll, ready for display
The old lining was removed by spraying
filtered water onto the front of the painting. This allows blotting
paper underneath to absorb old adhesive and paper degradation
products, which then dissolve. Wheat starch paste, put onto the
paper and dried, was then used to attach a new lining of
usumino Japanese paper. Uda paper was then added
with a very thin paste (kept in storage for 10 years before it is
used) and attached by pounding with uchibake
brushes.
The work on the Tiger painting is one of a
number of conservation projects carried out in collaboration with
the Renmei Scroll Mounting Federation and sponsored by the Sumitomo
Foundation.