FSC 9310 JCP K20
25% INDEX, WHITE AND COLORED
Index 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 high quality face and back offset printing of card indexes,
identification cards, office forms, notices, posters, covers, etc.,
requiring execution with pen and ink, erasing quality, and above average
permanence. Printed matter may include text, line illustrations,
halftones, and solid reverses.
Stock: Not less than 25 pct cotton or linen fibers; the remainder
bleached chemical woodpulp.
Note: \1\ Postconsumer fiber, in any percentage, is encouraged,
provided that the requirements of this Standard are met.
Acidity: pH value shall average not less than 6.5 for white and 5.0 for
colored paper.
Rosin: Average, not to exceed 2.5 pct for papers having pH value less
than 6.5.
Grammage (g/m \2\).................. 165 200 255 305
Basis weight: 25\1/2\ by 30\1/2\ 90 110 140 170
inches, 500 sheets (pounds)......
A tolerance of 10 pct shall be allowed.
Bursting strength: Average,
not less than (kPa)............... 270 450 580 690
Equivalent (lb/in\2\)............. 40 66 85 100
Thickness: Average (mm)............. 0.190 0.230 0.290 0.350
Equivalent (inch)................. 0.0074 0.0091 0.0114 0.0138
A tolerance of 0.013 mm (0.0005 inch) shall be allowed
for the 165, 200, 255 g/m\2\ paper and 0.020 mm (0.0008
inch) on the 305 g/m\2\. 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 and characters written with
pen and ink shall be clear cut 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 a
target brightness of 80 pct for the white paper. The color variation
shall not exceed DE(CIELAB)=1.0.
For colored stock, paper shall match one of the established
standards. Standards are blue, buff, green, pink, salmon, or yellow.
Colors shall not fade 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.
Finish and formation: Shall be uniform.
Cleanliness: The dirt count for each side of the paper shall not
exceed 250 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.
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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 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)=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 color standard are
L*=94.0
a*=-0.5
b*=4.0
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.
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\1\ This grade is typically a low Government usage paper and
currently not readily and/or economically available with postconsumer
recovered fiber content. If a postconsumer recovered fiber content is
desired in the paper, that number will be stated in the procurement
document. Note, recovered material (cotton/linen) is not a postconsumer
recovered fiber.