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Over the past several
decades, screen printing has left an indelible
mark on the automotive industry.
Appreciated for its simplicity, its ability
to print a wide variety of materials, and
its economy, the process has been used
to image automotive components ranging
from membrane-switch climate controls
to dashboard instrumentation. And
if you've ever looked your car over carefully,
you may have noticed a few other
screen-printed items—the windows.
Today, virtually all automotive glass
features a dark enamel border that is
usually screen printed on the inside surface
of the glass (Figure 1). On most
vehicles, this border begins as a solid,
opaque field at the window edge and
"dissolves" into a pattern of progressively
smaller dots extending inward from
the edges for as much as 3 in. before disappearing
entirely. What makes these
borders unique is the production process
they undergo and the two primary
functions they serve.
