FSC 9310                                                         JCP L20
Cover Paper                                             February 1, 1999

Use information: This paragraph is informational only and is not 
    exclusively definitive of the end use.
  For high quality multicolor face and back offset printing of 
brochures, programs, covers for books, periodicals, etc. Printed matter 
may include text, line illustrations, halftones up to 150-line screen, 
and solid reverses.

Unless the option below is specified, the following `basic' 
    specification applies.
Stock: Groundwood pulp, not to exceed 1 pct.

    Note: Not less than 30 pct postconsumer fiber. Any percent over 30 
  percentage points, is encouraged, provided that the requirements of 
  this Standard are met.

Grammage (g/m2).................................     135     175     215
  Basis weight: 20 by 26 inches, 500 sheets           50      65      80
  A tolerance of 5 pct shall be

Bursting strength: Average, not less than
  (kPa).........................................     210     270     340
  Equivalent (lb/in\2\).........................      31      40      50

Tearing strength: Average, each direction,
  not less than (mN)............................     980   1,270   1,560
  Equivalent (grams)............................     100     130     160

Opacity: For white only, average, not less
  than (percent)................................      94      95      95
  No individual specimen shall average less than      92      93      93

General appearance: Paper shall conform to the standard sample(s) 
  adopted by the Government.

  Color: The paper in the order (or publication) shall be uniform with 
  the brightness of the white paper not less than 81 pct. The color 
  variation shall not exceed DE(CIELAB)=1.0.
    For colored stock, paper shall match one of the established 
  standards or as specified. Standards are vermillion red, canary 
  yellow, sun orange, killarney green, victoria green, dutch blue, 
  venice blue, peach tan, pecan brown, saddle tan, light gray, or sand 
  gray. Colors shall not fade or transfer (rub off) and shall appear 
  even and uniform on the surface of the sheet. Stock shall not be 2-
  sided. Color coordinates for selected standards are included in Part 

    Note: (1) Paper having the best color match to these listed color 
  standards is typically available from the GPO central office or when 
  the color is purchased in a mill run quantity. (2) The closeness of 
  the color match required of the paper supplied shall be designated 
  ``precision'', ``regular'', etc. If no designation is specified, a 
  ``regular'' acceptance criteria will be applied to judge acceptability 
  of the color match for hue, chroma, or saturation differences.
  Finish and formation: Shall be uniform.
  Cleanliness: The dirt count for each side of the paper shall not 
  exceed 650 specks per square meter. No sample sheet (600 to 650 cm\2\ 
  in size) shall contain more than one defect with an equivalent area of 
  0.25 mm\2\ or greater.
    Note: This property is automatically waived when the ordering agency 
  has specified a stock which includes ``fibers'' or ``specks'' in the 
  surface of the sheet.
Sampling and testing: Shall be conducted in accordance with standards in 
  Part 2, Government Paper Specification Standards.

 Option A: Alkaline paper. This option is for products requiring above 
                 average permanence for white stock only.
  The following requirements replace the same in the `basic' 
specification and are added to the specification.
Stock: 100 pct bleached chemical woodpulp.

    Note: Postconsumer fiber, in any percentage, is encouraged, provided 
  that the requirements of this Standard are met.
Acidity: pH value by cold extraction of the white stock shall be not 
  less than 7.0. The paper shall contain not less than 2 pct calcium 
    Any deviation in this requirement shall be sufficient cause for 
  rejection of the paper.


 Unless otherwise specified, the following is automatically waived when 
  printing or duplicating is to be accomplished on commercial contract
Sizing: Paper shall be surface- and internal-sized suitable for 
  satisfactory printing on both sides of the paper on high-speed offset 
  presses equipped with continuous flow or brush dampening systems.

Color: Shall match the Government's standard sample for color. A 
  deviation of DE(CIELAB)=0.5 from the color standard for white and 2.0 
  for colored stocks is allowed. A color difference 1.0 DE unit between 
  felt and wire sides is permitted.
    For information only, the CIELAB values (Ill D65, 10 deg. observer) 
  of the color standard are
Curl: Paper shall lie flat with either no tendency to curl or with a 
  curl which can be overcome under reasonable working conditions.
Surface: Shall be free from lint, fuzz, or any particles which will 
  pick, lift, fluff, or pile on the blanket under normal press 
Size and trim: Sheets: Paper shall be furnished in the sizes(s) ordered 
  and shall be flat, trimmed square on four sides with clean smooth 
  edges, and evenly jogged. A tolerance of 2 mm (\1/16\ 
  inch) shall be allowed except for sheets 216 by 356 mm (8\1/2\ by 14 
  inches) or less; then a tolerance of 1 mm (\1/32\ inch) 
  shall be allowed. Successive sheets within any package shall not 
  differ from each other by more than 0.5 mm (\1/64\ inch). Paper with 
  the long dimension 813 mm (32 inch) or less shall be considered square 
  if the variation does not exceed 1 mm (\1/32\ inch); over 
  813 mm (32 inches), 2 mm (\1/16\ inch).
Grain: Direction of the grain on flat paper shall be as ordered.
Pressroom conditions: The bulk of this paper will be used in air-
  conditioned pressrooms maintained at 24  deg.C 2  deg.C 
  and 45 pct 8 pct relative humidity.