Paper Mache, is a composite
material consisting of paperpieces or pulp, sometimes reinforced
with textiles, bound with an
adhesive, such as glue,starch, or wallpaper paste. In French, it means
Chewed paper.
Two
main methods are used to prepare papier-mâché. One makes use of paper strips
glued together with adhesive. The other method, as the name suggests, uses
paper pulp obtained by soaking or boiling paper to which adhesive is then
added.
The
traditional method of making papier-mâché adhesive is to use a mixture of water
and flour or other starch, mixed to the consistency of heavy cream. Other adhesives can be used if
thinned to a similar texture, such as polyvinyl
acetate-based glues. Adding oil
of cloves or other additives such
as salt to the mixture reduces the chances of the product developing mold.
For the
paper strips method, the paper is cut or torn into strips, and soaked in the
paste until saturated. The saturated pieces are then placed onto the surface
and allowed to dry slowly. The strips may be placed on an armature, or skeleton, often of
wire mesh over a structural frame, or they can be placed on an object to create
a cast. Oil or grease can be used as a release agent if needed.
Once
dried, the resulting material can be cut, sanded and/or painted, and
waterproofed by painting with a suitable water-repelling paint. Before painting any product of
papier-mâché, the glue must be fully dried; otherwise mold will rot from the
inside out.
For the
pulp method, the paper is left in water at least overnight to soak, or boiled
in abundant water until the paper dissolves in a pulp. The excess
water is drained, an adhesive is added and the papier-mâché applied to a form
or, especially for smaller or simpler objects, sculpted to shape.
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