FSC 9310 JCP A260
DULL COATED OFFSET BOOK
Printing Paper February 1, 1999
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Use information: This paragraph is informational only and not
exclusively definitive of the end use.
For multicolor face and back offset printing of books, pamphlets,
periodicals, brochures, etc., and for high quality reproduction of
satellite and high-altitude imagery. Printed matter may include text,
line illustrations, halftones up to 175-line screen, and reproduction of
continuous-tone imagery by a random dot process. Low glare; suited for
heavy text.
Unless the option below is specified, the following `basic'
specification applies.
Stock: Groundwood pulp, not to exceed 1 pct.
Note: Not less than 10 pct postconsumer fiber. Any percent over 10
percentage points, is encouraged, provided that the requirements of
this Standard are met.
Acidity: pH value of coating shall average not less than 6.5.
Grammage (g/m \2\)........................... 90 105 120
Basis weight: 25 by 38 inches, 500 sheets 60 70 80
(pounds)..................................
A tolerance of 5 pct shall be
allowed.
Bursting strength: Average, not
less than (kPa)............................ 100 170 240
Equivalent (lb/in \2\)..................... 15 25 35
Opacity: Average, not less than
(percent).................................. 93 94 95
No individual specimen shall average less 91 92 93
than (percent)............................
Thickness: Average (mm)...................... 0.075 0.090 0.105
Equivalent (inch).......................... 0.0030 0.0035 0.0041
A tolerance of 0.013 mm (0.0005 inch) shall be allowed.
Paper shall be uniform and shall not vary more than 0.011 mm (0.0004
inch) from one edge to the other.
Gloss (75): Average, each side
percent................................. 25 to 40 25 to 40 25 to 40
Smoothness of coating: Average,
each side, not to exceed (units)........ 60 60 60
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 not less than 81 pct. The color variation shall not
exceed DE(CIELAB)=1.0.
Formation: Shall be uniform. The coating shall be uniformly applied;
shall not be gritty, mottled, stippled, or ribbed in appearance; shall
not crack or flake off.
Cleanliness: The dirt count for each side of the paper shall not
exceed 100 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.
Sampling and testing: Shall be conducted in accordance with standards in
Part 2, Government Paper Specification Standards.
OPTION
Option A: Alkaline paper. This option is for products requiring above
average permanence.
The following requirements replace the same in the `basic'
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 shall average not less than 7.0 for
both the coating and base paper.
Any deviation in this requirement shall be sufficient cause for
rejection of the paper.
Cleanliness: The dirt count for each side of the paper shall not exceed
50 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.
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Unless otherwise specified, the following is automatically waived when
printing or duplicating is to be accomplished on commercial contract
Equilibrium relative humidity: Shall be 45 pct 8 pct at 23
deg.C 2 deg.C.\1\
Color: Shall match the Government's standard sample for color.
For information only, the CIELAB values (Ill D65, 10 deg. observer)
of the color standard are
L*=93.5
a*=-0.5
b*=1.5
Curl: Paper shall lie flat with either no tendency to curl or with a
curl which can be overcome under reasonable working conditions.
Coating and surface: Shall be uniform, free from mottle and any
particles which will pick, lift, or pile on the blanket under normal
press conditions.
Size and trim: Sheets: Paper shall be furnished in the size(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 inches) 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.
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\1\ This requirement may be waived when so stated in the procurement
document. If waived, the following is applicable:
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.