The Alkaline Paper Advocate

Volume 4, Number 1
Feb 1991


ANSI Z39.48-1984 Compared with Two Standards Now Being Drafted

 

  ANSI Z39.48-1984 ANSI/NISO Z39.48 (proposed) 12/90 ISO (4th Working Draft) 11/90
pH

7.5 min.

7.5-10.0; 7.0 min. for base paper if coated

7.5-10.0 for each layer of the paper

Alkaline reserve*

2%

2%

2%

Fiber(Paper stock)

No groundwood or unbleached pulp

-

<50 g mechanical pulp/kg fiber

Lignin

-

7.5% max. (Kappa # <50)

Kappa<5.0

Fold endurance -

30 (@ 1 kg) MIT

-

-

Tear resistance

40 g for papers 74 g/m2 (about 20 lb bond)

Tear index of 5.25 mNm2/g; 3.5 mNm2/g for coated

350 mN for papers >70 g/m2; for lighter papers a formula gives tear index

*Minimum, calculated as equivalent to calcium carbonate.

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URL: http://cool.conservation-us.org/byorg/abbey/ap/ap04/ap04-1/ap04-110.html
Timestamp: Sunday, 03-Mar-2013 21:41:44 PST
Retrieved: Saturday, 25-Nov-2017 09:26:28 GMT