STOCK                                                            JCP V90
      TYVEK<SUP>TM </SUP>ENVELOPES OR SIMILAR WITH 2-FLAP ADHESIVE
Envelope                                                February 1, 1999
                        STYLES, FLAT AND GUSSETED
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Use information: This paragraph is informational only and is not 
    exclusively definitive of the end use.
  For face offset printing. Printed matter may include text and line 
illustrations.

Stock: White spunbonded polyethylene with the characteristics of 
  DuPont's product No. 1073.

    Note: Not less than 25 pct postconsumer material. Any percent over 
  25 percentage points, is encouraged, provided that the requirements of 
  this Standard are met.


Grammage (g/m\2\)............................................         68
  Basis weight: 17 by 22 inches, 500 sheets (pounds).........         18
  A tolerance of <plus-minus>10 pct shall be allowed.

Bursting strength: Average not less than (kPa)...............        960
  Equivalent (lb/in\2\)......................................        140

Opacity: Average, not less than (percent)....................         87

Thickness of single layer of polyethylene: Average
  (mm).......................................................       0.18
  Equivalent (inch)..........................................      0.007
  A tolerance of <plus-minus>0.03 mm (0.001 inch) shall be allowed.


Construction: Center seam envelopes with one open end forming a sealing 
  flap not less than 23 percent of the width of the envelope. The center 
  seam shall overlap a minimum of 16 mm (\5/8\ inch) or 6 percent of the 
  width of the envelope, whichever is greater. The width of the overlap 
  of the bottom flap shall be not less than 10 percent of the width of 
  the envelope, in no case shall this overlap be less than 21 mm (\13/
  16\ inch). The envelope may or may not have gussets as specified.
Flap adhesive: Shall have a pressure sensitive adhesive, (1) latex self 
  seal or (2) with a removable strip-release liner system as specified 
  by the ordering agency.
  Latex self-seal: The sealing flap and the area on the back of the 
  envelope which is covered by the sealing flap shall each be coated 
  with a 38 mm (1\1/2\-inch) strip of pressure sensitive adhesive. These 
  adhesive strips shall contact each other when the envelope is sealed.
    The cohesive force holding these flaps closed shall be not less than 
  0.15 kN/m (0.40 kg per linear inch) when measured by a 90\1/2\ tape 
  pull (T-pull) at a constant rate of elongation of 20 mm/mm.
    OR
  Release liner adhesive: The sealing flap shall contain permanent type 
  pressure sensive adhesive and a suitable protective cover sheet, or at 
  the contractor's option, may be a strip of transfer tape with not less 
  than 25 mm (1-inch) wide adhesive.
    Aggressiveness of adhesive must cause substrate damage upon opening 
  envelope 12 hours after sealing. Adhesive must have functional 
  characteristics of 3M's Scotch Y-9498.
General appearance: Evelopes shall conform to the standard sample(s) 
  adopted by the Government.
  Color: The envelopes in the order shall be uniform with a target 
  brightness of the white paper not less than 81 pct. When a match to a 
  Government color standard has not been specified, the commercial 
  standard for white is applicable. The color variation shall not exceed 
  DE(CIELAB)=1.0.
  Finish: Shall be similar to the commercial product Tyvek<SUP>TM</SUP>.
  Cleanliness: The dirt count for each side of the paper shall not 
  exceed 250 specks per square meter. No envelope (up to 300 cm\2\ in 
  size) shall contain more than one obvious and objectionable foreign 
  particles with an equivalent area of 0.25 mm\2\ or greater on the face 
  of the envelope. (The number of particles permitted is proportinately 
  higher for larger envelopes.)
Sampling and testing: Shall be conducted in accordance with standards in 
  Part 2, Government Paper Specification Standards.

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 Unless otherwise specified, the following is automatically waived when 
  printing or duplicating is to be accomplished on commercial contract
Construction: Shall be as specified by the ordering agency as to whether 
  ``flat'' or ``gusseted'' and with ``latex self seal'' pressure-
  sensitive adhesive or with a ``removable strip'' over the adhesive.

Size: The size of the envelope shall be as ordered. A tolerance of -2 
  mm, +4 mm shall be allowed. Dimensions are inside measurements. The 
  size of the gusset shall be specified. A tolerance of +2 mm shall be 
  allowed on the gusset.
Pressroom conditions: The bulk of these envelopes will be used in air-
  conditioned pressrooms maintained at 24 <plus-minus>2  deg.C and 45
  <plus-minus>8 pct relative humidity or offices with atmospheric 
  conditions of 21 <plus-minus>5.5  deg.C and 50 <plus-minus>20 pct 
  relative humidity.