JCP A80 Opacified Offset Book February 1, 2008 

Printing Paper FSC 9310 

 

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 books, pamphlets, folders, etc. Printed matter may include text, 
line illustrations, halftones up to 150-line screen and solid reverses. 

 

 

Stock: Groundwood pulp, not to exceed 1%. The total 
lignin content of the paper shall not exceed 3% of the fiber 
weight. 

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

 

Basis weight: 25 by 38 inches, 

500 sheets (pounds)…………………. 401 501 60 

A tolerance of +5% shall be allowed. 

 

Bursting strength: Average, not less 

than (lb/in2) …………………………. 16 20 25 

 

Opacity: Average, not less than 

(percent) ……………………............. 89 91 93 

No individual specimen shall 

average less than (percent) …………. 87 89 91 

Thickness: Average (mils) ………… 3.0 3.9 4.7 

A tolerance of +0.0005 inch shall be allowed. Paper shall 
be uniform and shall not vary more than 0.0004 inch from 
edge to edge. 

 

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

Brightness: Shall target not less than 81% or as specified. 

 

Color: The paper in the order (or publication) shall be 
uniform and the color variation shall not exceed 
DE(CIELAB) = 1.0. 

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 cm2 in size) shall contain more than one defect 
with equivalent area of 0.25 mm2 or greater. 

 

 

OPTION 

 

Alkaline paper. This option is for products requiring above average permanence. Replace above with the following 
properties.

 

Stock: 100% bleached chemical woodpulp. 

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

 

 

 

Acidity: pH value by cold extraction shall be not less than 
7.0. The paper shall contain not less than 2% calcium 
carbonate. 

Note: Any deviation from requirement is sufficient cause 
for rejection of the paper. 

Testing: Shall be conducted in accordance with methods in part 2, Government Paper Specification Standards. The 
acceptance criteria Part 4 shall apply. 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

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1 These weights are typically not available in less than mill run quantities.