Exercise 4: Post-it Note (Segmented)

Description Case 4:  Post-it Note

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A Post-it note is  an easy way
to temporarily annotate a
document by applying a small
square of colorful, durable
paper using a strip of
repositionable adhesive on the
back of the note.
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The most common Post-it notes
are 1.5-by-2-inch rectangles
of nonwhite (usually yellow)
paper available in pads of 100.
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However, 55 larger sizes and
shapes (up to poster size) are
also available.
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Post-it paper is well suited to
making reliable notes because it:
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(1) does not tear or fray easily,
    even after repeated uses,
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(2) is highly opaque, resisting
    bleed-through from ink or
    felt-tip pens, and
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(3) comes in 29 colors that
    visually contrast with the
    document pages to which the
    notes are applied.
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The adhesive that holds the note
to its target page lies in a
half-inch strip along the top
edge of the back of each Post-it.
                                       ---
Post-it adhesive consists of
tiny sticky spheres that do not
easily dissolve or melt, and
that have about the same diameter
as the paper fibers they touch.
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This adhesive therefore combines
several unusual properties.
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First, the adhesive is clear and
thinner than standard plastic
mounting tape.
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Second, unlike an adhesive
bandage, it leaves no residue on
the page to which the Post-it is
applied.
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Third, the adhesive is long-
lasting while undisturbed;
Post-it notes will cling for
months (at room temperature)
before falling off their applied
surfaces.
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And fourth, the adhesive is also
reusable.
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A clean Post-it may be removed
and reapplied in the same or a
different location dozens of
times before the adhesive strip
fails to hold the note to its
target (unlike most tape).
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Art Fry of 3M Corp. first
developed the Post-it note in
1980.
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