FSC 7530 JCP J10
LEDGER, WHITE AND COLORED
Ledger Paper February 1, 1999
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Use information: This paragraph is informational only and is not
exclusively definitive of the end use.
For face and back and offset printing of open forms, ledgers, notices,
posters, etc., requiring execution with pen and ink and erasing quality.
Printed matter may include text, line illustrations, halftones, and
solid reverses.
Unless the option below is specified, the following `basic'
specification applies.
Stock: Groundwood pulp, not to exceed 1 pct. The total lignin content of
the paper shall not exceed 3 pct of the fiber weight.
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.
Acidity: pH value shall average not less than 6.5 for white paper and
5.0 for colored paper.
Grammage (g/m2)..................... 90 105 120 165
Basis weight: 17 by 22 inches,
500 sheets (pounds)............... 24 28 32 44
A tolerance of 5 pct shall be allowed.
Bursting strength: Average, not less 150 170 190 250
than (kPa).........................
Equivalent (lb/in2)............... 22 25 28 37
Tearing strength: Average, each 340 490 580 880
direction, not less than (mN)......
Equivalent (grams)................ 35 50 60 90
Thickness: Average (mm)............. 0.105 0.120 0.135 0.185
Equivalent (inch)................. 0.0041 0.0047 0.0053 0.0073
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.
Ruling and writing qualities: Lines ruled or characters written with pen
and ink shall be clear and free from excessive feathering.
Erasing quality: Paper shall retain good ruling, writing, and typing
quality, texture, and surface appearance, without ink spreading after
repeated erasures. Samples from the delivery shall show no greater
resistance than the standard sample to removal by abrasion of
typewritten characters.
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. The standards are blue, buff, green, salmon, or yellow.
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 3.
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
025 mm\2\ or greater.
Finish and formation: Shall be uniform.
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 for white stock only.
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 of the white stock shall be not
less than 7.0. The paper shall contain not less than 2 pct calcium
carbonate.
Any deviation in this requirement shall be sufficient cause for
rejection of the paper.
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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 sheet 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)=3.0 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 white color standard are
L*=93.3
a*=1.0
b*=-2.0
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
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.
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.