OVERVIEW
& STATISTICS
SURVEYING
TREATMENT
SCANNING
RESOURCES
CONSOL
CONSOL Energy Inc.
PA
DEP
Pennsylvania
Dept. of Environmental Protection
NMMR
National
Mine Map Repository,
US Dept. of the
Interior,
Office of Surface
Mining, Reclamation & Enforcement
ULS
University Library
System, University of Pittsburgh
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Treatment
Mending & Re-lining
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During
Treatment |
After
Treatment |
Maps
that are torn or have
large pieces missing are cumbersome to handle, transport and
scan.
After the old backing is removed, the paper map can be repaired with
long-fibered tissue and paste
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A partial re-lining with long-fibered tissue and linen.
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Significant areas of loss are mended with muslin patches and Beva D-8. |
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After the map has been stabilized, it has enough flexibility to
roll onto a large diameter core in order to transported to the scanning
facility.
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Maps with torn and
deteriorated backing are re-lined with long fiber tissue and muslin.
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Humidification & Flattening
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A map that has been stored
tightly rolled over the years (picture at
left) can crack and break when unrolled. In order to unroll these
maps safely without causing additional damage the maps are placed in a
humidity
chamber.
As the map absorbs humidity
inside the chamber it relaxes and is able
to be carefully unrolled a section at a time without cracking. (below
left)
Once the map is completely
unrolled it is taken out of the humidity
chamber and placed between felts to dry flat. (below right)
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Tape Removal & Adhesive Reduction
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Many
maps were previously repaired with various kinds of pressure-sensitive
tape. The tape must be removed, and the adhesive reduced in order to
adhere a
new mend over the tear.
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Old tapes and glues applied to the back of a map become rigid over time
causing the map to crease and crack. The old tapes and glues are
removed and the map is re-lined with long fiber tissue.
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During
treatment
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After
treatment
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After removing tape from the front of a map any remaining adhesive
residue is reduced. The white residue in the picture is
covering up part of the drawing and after removal the drawing is
visible.
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