Decal
A decal or transfer is a plastic, cloth, paper or ceramic substrate that
has printed on it a pattern or image that can be moved to another surface upon
contact, usually with the aid of heat or water.
The word is short for decalcomania, which is the
English version of the French word décalcomanie.
The technique was invented by Simon François Ravenet,
an engraver from France who later moved to England and perfected the process he
called "décalquer" (which means to copy by tracing); it became
widespread during the decal craze of the late 19th century.
Properties
Different
variations of decals include: water-slide or water-dip; and vinyl
peel-and-stick. A water-slide (or water-dip) decal is screen-printed on a layer
of water-soluble adhesive on a water-resistant paper, that must first be dipped
in water prior to its application.
Upon contact
with water, the glue is loosened and the decal can be removed from its backing;
overly long exposure, however, dissolves the glue completely causing the decal
to fail to adhere. A peel-and-stick decal is actually not a decal as described
above, but a vinyl sticker with adhesive backing, that can be transferred by
peeling off its base. The sign industry calls these peel-and-stick vinyl
stickers vinyl-cut-decals.
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