Papier-mâché decoy
Dating to c. 1870, this yellowlegs shorebird stick-up is a rare, early example of a decoy made of papier-mâché. In areas where the painted surface is lost, brown paper is visible. When viewed under an ultraviolet source, patches where paint is missing show a bright orange autofluorescence, similar in appearance to the autofluorescence of shellac when viewed under UV, indicating that shellac is present as a binding material for the paper layers or as a sealant layer that was applied before the paint.
It is evident by its simple and non-uniform appearance that this decoy was not made using a mold, and it was radiographed in order to learn more about its method of manufacture; for example, whether there was an internal support structure around which the paper layers were formed.
The radiographs show that a metal tube is inserted vertically into the center of the body and the wood stick-up dowel is inserted into the tube. Slits were cut in the top of the tube, and the metal was bent out horizontally, which serves to support the interior of the upper back.
The radiopaque surface layer is likely lead paint. Wrinkles and pitted surfaces in the paper substrate are visible, as well as dark lines and shapes where paint has been lost. In some locations on both axial and lateral view (likely where the paint is thinner) a material that appears similar in appearance to wire mesh is visible under the papier-mâché layer. In lateral view volume rad slices the mesh material becomes more clearly visible under the paper and paint layer.
In another lateral volume rad slice (Image set 1007: 15/32), a small square comes into view that is the interior end of the bill, anchored at the very back of the head.
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- Anterior-posterior view radiograph of Yellowlegs Stick-up 1963-60.21
- Lateral view radiograph, volume rad slice (Image set 1008, 16/34) of Yellowlegs Stick-up 1963-60.21
- Lateral view radiograph, volume rad slice 15/32 of Yellowlegs Stick-up 1963-60.21
- Lateral view radiograph of Yellowlegs Stick-up 1963-60.21
- Yellowlegs Shorebird Stick-up Papier-mâché Decoy, 1963-60.21