Astm D 4825 – 97 (Reapproved 2002) pdf free download

Standard Test Method for
Measurement of Curl in Cut-Sized Office Paper1

This standard is issued under the fixed designation D 4825; the number immediately following the designation indicates the year of
original adoption or, in the case of revision, the year of the last revision. A number in parentheses indicates the year of last reapproval. A
superscript epsilon (e) indicates an editorial change since the last revision or reapproval.

1. Scope

1.1 This test method covers the measurement of curl in
cut-sized office papers at ambient conditions. The test method
would typically be used in evaluating papers described in
Specification D 3460 or after processing in a copier or printing

1.2 Cut-sized office papers are generally described as having dimensions of 81⁄2 by 11 in., 81⁄2 by 13 in., 81⁄2 by 14 in.,
and 11 by 17 in.

1.3 This standard does not purport to address all of the
safety concerns, if any, associated with its use. It is the
responsibility of the user of this standard to establish appropriate safety and health practices and determine the applicability of regulatory limitations prior to use.

2. Referenced Documents

2.1 ASTM Standards:
D 528 Test Method for Machine Direction of Paper and
D 585 Practice for Sampling and Accepting a Single Lot of
Paper, Paperboard, Fiberboard, and Related Products2
D 685 Practice for Conditioning Paper and Paper Products
for Testing2
D 3460 Specification for White Watermarked and Unwatermarked Bond, Mimeo, Spirit Duplicator, Reprographic and
Laser Printer Cut-Sized Office Papers2
D 5039 Test Methods for Identification of Wire Side of

3. Summary of Test Method

3.1 A lift of approximately 10 to 20 sheets of paper are
removed from a sealed ream and the curl is measured noting
the axis, direction, and magnitude of the curl.

3.2 The tests can be conducted at 50 % relative humidity or
at ambient conditions, if it is carried out quickly

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