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PATCHING
The process of fixing material onto window envelopes.
PATCH MATERIAL
Translucent or clear material covering an envelope window (Plastine
or Cello).
PATCH POCKET
Paper or window film gummed on 3 sides to form a pocket. Typically
done on the inside of envelopes behind a window, they can also be
adhered to the outside of an envelope.
PDF
Portable Document Format; a file format commonly used for sending
viewable files via e-mail.
PEEL and SEAL
Self-sealing envelopes that have a liner on the flap; strip liner
off and close flap for a tight seal. See our Peel
& Seal page for a complete selection.
PERFORATION
Holes of precise dimensions/spacing pressed into paper for ease
of separating.
PHOTOPOLYMER
Plate material that is photosensitive and upon exposure, its compounds
polymerize to form a tough, abrasion-resistant surface that becomes
the inking media.
PICA
A unit of type measure; 1/6 of an inch. One pica equals 12 points.
72 points equals one inch.
PLATE
The image carrier in letterpress and flexographic printing.
PMS
Pantone Matching System. A color matching system that has a palette
of colors with matching ink formulas.
POROSITY
The property of paper that allows air to pass through it.
POSITIVE
Corresponds with the original artwork in all aspects.
PRES-STIK®
Western States' trade name for a latex type seal.This self-sealing
adhesive does not require moisture.
PRESSURE SENSITIVE
When self-sealing envelope adhesives are applied to the seal flap
and covered by release paper.
PRESSURE SENSITIVE GUMMING
A self-seal adhesive flap activated by pressure, protected by a
strip of silicone paper to prevent premature bonding. Often found
on board backed envelopes. Often referred to as "peel and stick"
or secure seal/strip seal.
PRESORT
A form of mail preparation. Pieces are grouped in a mailing by zip
code or other USPS recommended separation in order to bypass certain
postal operations.
PRESS PROOFS
The initial printed material checked before the production run is
made.
PRINTING
The choice of a printing process depends upon the size of the run,
the complexity and quality of the camera ready or electronic art,
the number of ink colors, the paper stock and the level of quality
desired.
PRINT RESOLUTION
The quality of print; the level of detail achieved by a printer.
Measured in dpi (dots per inch), typical capabilities are 200 dpi
for a thermal transfer printer and 300 dpi for a laser printer.
Resolution is critical in barcode printing.
PROCESS COLORS
Colors created by mixing halftones of the four process colors (cyan,
magenta, yellow and black).
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