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TAPPI: Leading Technical Association for the Pulp, Paper, and converting Industry

TAPPI, the Technical Association for the Pulp, Paper and Converting Industry, is a nonprofit organization that develops and publishes standards concerning the pulp, paper, packaging and converting industries, as well as several related industries. Headquartered near Atlanta, United States, TAPPI standards are used by its approximately 14,000 members. TAPPI is a major publisher, putting out several industry-specific periodicals as well as a peer-reviewed journal. TAPPI also serves as the administrator for the U.S. TAGs (United States Technical Advisory Group) to ISO/TC 6 (International Organization for Standardization/Technical Committee) and to two of its subcommittees. Standards from TAPPI are available both individually, directly through the ANSI webstore, and as part of a Standards Subscription. If you or your organization are interested in easy, managed, online access to standards that can be shared, a Standards Subscription may be what you need - please contact us at: StandardsSubscriptions@ansi.org or 1-212-642-4980 or Request Proposal Price.

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TAPPI T 411 om-15

Thickness (caliper) of paper, paperboard, and combined board

This method describes the procedure for measuring single-sheet thickness and variations in single sheet thickness of paper, paperboard, and combined board.


TAPPI T 494 om-06

Tensile properties of paper and paperboard (using constant rate of elongation apparatus)

  1. This test method describes the procedure, using constant-rate-of-elongation equipment, for determining four tensile breaking properties of paper and paperboard: tensile strength, stretch, tensile energy absorption, and tensile stiffness.
  2. This procedure is applicable to all types of paper and paperboard within the limitations of the instruments used, whether the instruments perform horizontal or vertical tests or whether they are manually operated or computer controlled. It is also applicable to handsheets, with modifications, as specified in TAPPI T 220 "Physical Testing of Pulp Handsheets." It does not apply to combined corrugated board.


TAPPI T 213 om-15

Dirt in pulp - chart method

  1. This method (1,2) is adapted to the numerical estimation of dirt in pulp and recycled pulp in terms of equivalent black area.
  2. The results will differ from those obtained by TAPPI T 246 "Foreign Particulate Matter in Pulp by Transmitted Light (w/d)" in that it is the contrasting color of foreign matter rather than its opaqueness that affects the result.
  3. An automated procedure for dirt count can be found in TAPPI T 563 "Equivalent Black Area (EBA) and Count of Visible Dirt in Pulp, Paper, and Paperboard by Image Analysis." Both this procedure and T 563 are based on Equivalent Black Area (EBA) measurement.


TAPPI T 410 om-19

Grammage of paper and paperboard (weight per unit area)

In the United States the customary or commercial term for expressing the "weight" per unit area (more properly "mass per unit area") of paper has been "basis weight," "ream weight," or "substance." These are defined as the mass in pounds of a ream of a given sheet size and number of sheets (usually 500 sheets, occasionally 480 sheets). In most other countries the mass per unit area is expressed in grams per square meter (g/m2). The French term for mass per unit area, "grammage," is recommended by ISO Committee TC 6 on Paper for use in English as well as in French because of its convenience and clear relationship to g/m2. The mass per unit area of paperboard has been expressed in the customary system as the mass in pounds per thousand square feet and in the metric system as grams per square meter. The SI metric units, in which grammage (mass per unit area) is expressed in g/m2, are the preferred units for TAPPI Test Methods.


TAPPI T 564 sp-16

Transparent chart for the estimation of defect size

2.1 The transparent chart developed for this method is to be used to estimate the size (area) of spots, defects, and/or other inclusions over the range of 0.02 to 5.00 mm2.
2.2 The chart can be used in a large number of applications where there is a need to estimate a size (area) by way of a direct comparison to a known area disk or rectangle. Applications may include, but are not limited to, the measurement of visible ink spatter on printed surfaces, the estimation of the growth rate of bio-colonies, air inclusions in transparent plastic castings and films, etc.
2.3 The chart must not be used to estimate the equivalent black area (EBA) of dirt or other colored specks. Dirt measurements by the EBA method should be performed in accordance with TAPPI T 437 “Dirt in Paper and Paperboard,” TAPPI T 213 “Dirt in Pulp,” or TAPPI T 563 “Equivalent Black Area (EBA) and Count of Visible Dirt in Pulp, Paper, and Paperboard by Image Analysis.” Do not use this chart for T 437, T 213, or T 563.


TAPPI TIP 0305-34:2008

Daily, weekly, and monthly maintenance checklists

This technical information paper is to be used as a guide to establish specific plant maintenance checklists. It is a starting point, and modifications will be required to fit specific plant circumstances as dictated by actual machine types, and other local factors.


T 403

Bursting strength of paper

This method is designed to measure the maximum bursting strength of paper and paper products having a bursting strength of 50 kPa up to 1200 kPa (7 psi up to 157 psi) and in the form of flat sheets of up to 0.6 mm (0.025 in.) thick. It is not intended for use in testing corrugated, fiberboard, linerboard, or hardboards that tend to cut the thin rubber diaphragm of the bursting tester. For testing paperboard and linerboard, see TAPPI T 807 "Bursting Strength of Paperboard and Linerboard"; for testing corrugated and solid fiberboard, see TAPPI T 810 "Bursting Strength of Corrugated and Solid Fiberboard."


T 483

Odor of packaging materials

Please make sure you have the latest version of Acrobat Reader. The presence of foreign or objectionable odors in packaging materials which are to be used near food, drugs, etc., may be a serious matter. The determination of the type and source of the odor, and the level, is the objective of this test procedure. The most sensitive instrument presently available is the trained human nose, and the significance of test results will be directly proportional to the ability of a test panel organized for the purpose.


TAPPI T 489 om-15

Bending Resistance (Stiffness) of Paper and Paperboard (Tabertype Tester in Basic Configuration)

This test method covers a procedure used to measure the resistance to bending of paper and paperboard. This test method is used to determine the bending moment required to deflect the free end of a 38 mm (1.5 in.) wide vertically clamped specimen 15° from its center line when the load is applied 50 mm (1.97 in.) away from the clamp. The resistance to bending is calculated from the bending moment. TAPPI T 566 "Bending Resistance (Stiffness) of Paper (Taber-Type Tester in 0 to 10 Taber Stiffness Unit Configuration)" describes a modification of the instrument described in this test method for measurements in the 0 to 10 Taber stiffness range only, and which requires a smaller test specimen. The modified procedure may be recommended for papers which are low in grammage, highly flexible, or both. Test results obtained using modifications of the basic Taber-type instrument such as that described in TAPPI T 566 "Bending Resistance (Stiffness) of Paper (Taber-Type Tester in 0 to 10 Taber Stiffness Unit Configuration)" have been reported to be as much as 40 different from those obtained using this test method, and such modifications must not be used when this test method is specified. Other procedures for measuring bending resistance include TAPPI T 535 "Stiffness of Paperboard (Resonance Length Method)" and TAPPI T 543 "Bending Resistance (Stiffness) of Paper (Gurley-Type Stiffness Tester)." The latter method has been classified as Classical.


T 507 cm-09

Grease resistance of flexible packaging materials

Describes an accelerated test designed to measure the transudation of oily or greasy constituents of products to flexible packages, such as those made from greaseproof, glassine, vegetable parchment, or other grease resistant papers and plastic coatings. This method is intended as a supplement for TAPPI T 454 "Turpentine Test for Grease Resistance of Paper" (see Additional Information 9.2 and 9.3).


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