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Click the relevant letter below to search for specific glossary terms.

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SATIN FINISH
A smooth paper finish.

SCORE
To impress or indent a mark in the paper to make folding easier.

SCREEN BUILD
Creating or building color by mixing halftone screens with the four color process colors (cyan, magenta, yellow and black).

SCRIBE LINES
Evenly spaced lines found on the plate cylinder to help mount rubber plates.

SEAL GUM
A type of envelope adhesive. There are two types, both used to seal envelope flaps: re-moistening that requires moisture to seal, and non-re-moistening that requires two gum surfaces and no water to seal.

SEAL GUM SEAM
The parts of the envelope sealed during manufacturing. The seam positions can impact the design of overprinted envelopes.

SEAM GUM SELF-SEAL
A natural latex coating applied on opposite sides of a flap; adheres to itself and nothing else.

SECURITY TINT
An opaque design printed on the inside of an envelope that makes it almost impossible to read through the envelope. They are most often used to send checks.

SEMI-GLOSS
A paper coated on one side.

SERIF
The strokes or "feet" at the ends of Roman Letters.

SET-OFF
An unwanted reversed image that appears during printing, from the back of one envelope to the face of the preceding. Due to inadequate drying, set-off is a significant problem with coated envelopes usually avoided by printing flat sheets or using a coating process.

SHADOWS
Indistinct image patterns that appear as solids or reverse prints, typically caused by poor ink distribution, plate inconsistency, substrate thickness, and/or poor base ink formulation.

SHEETER
A rotary knife machine that cuts specified lengths of paper from multiple rolls.

SHELF LIFE
The period of time during which a product can be stored under specified conditions and still remain suitable for use.

SHOULDER
The part of an envelope where the side flaps crease with the top flap.

SIDE SEAM
Side seams are formed by short side flaps or a wide bottom flap, providing a large area for printing on the envelope's back (e.g. reverse face and collection envelopes). Side seams may be folded under or over the bottom flap. Booklet envelopes are normally side seams, and some commercial envelopes can be ordered with a side seam.

SIDE SEAM GUM
A low-viscosity gum used to seal an envelope's side seams.

SIDE SEAM OVER
An envelope with its side seam folded over its back flap.

SIDE SEAM UNDER
An envelope with its side seam folded under its back flap.

SLIM JIM
A type of envelope considerably longer than it is high, with a baronial style flap. Used primarily for the new style of greeting cards.

SMUDGE RESISTANCE
The ability of paper (or plastic) to resist the smearing of ink immediately following printing or imprinting.

SPECIAL WINDOW
Any non-standard Western States envelope produced. Our window envelopes page shows the size and position of a standard window on commercial envelopes. We can change the size and place the window in almost any position on the envelope (minimum order is 2,500).

SPLICE
A method of joining paper or plastic webs within a pressure-sensitive roll to produce an operational continuous web.

SPLIT GUM
A seal gum application that has no gum over areas where the seal gum would normally contact the back seam gum area, in order to avoid tabbing and blocking.

SPLIT SEAL GUM
Gum pattern on the seal flap of envelopes used on automated inserting equipment; prevents flap from sticking to the back panel during storage in humid conditions.

SPOT COLOR
Requires making separate plates for each color being printed.

SPREAD
A slight enlargement of color or an image so it overlaps another color when printed.

SQUARE SHEET
A rectangular sheet of paper used to make envelope blanks.

STANDARD SUBSTANCE WEIGHTS:
Refers to the paper weights (in pounds) used in various types of envelopes:

  • 16 lb. is used for air mail envelopes.
  • 20 lb. is used for most commercial envelopes.
  • 24 lb. is a stronger weight than 20lb., used for most open side official and commercial envelopes.
  • 28 lb. is used for most open and catalog envelopes, as well as large size commercial envelopes.
  • 32 lb. is used for heavy-duty and clasp envelopes.
  • 40 lb. is used for large, heavy-duty, or storage envelopes that are frequently handled.

STRAIGHT GRAIN CUTTING
A method of cutting blank paper sheets into envelopes. Straight grain cutting from a 34" X 28" sheet of Bond or Writing Paper yields eight (8) #10 commercial envelopes.

STRING-AND-BUTTON
A mechanical closure with a string attached to the flap and a button on the body of the envelope. Used mostly in interoffice and other reusable envelopes.

STRIP-AND-SEAL
A pressure sensitive adhesive applied to the envelope flap and covered with a protective strip until the envelope is ready to be sealed.

STORAGE LIFE
The time a product can be stored under specified conditions and still remain suitable for use; normally 6-9 months for most envelopes.

SUBSTANCE WEIGHT
Same as basis weight, measured in pounds, of a ream (500 sheets) of paper in its basic size.

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