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The following TAPPI Standards have been approved as American National Standards by the ANSI Board of Standards Review:

New American National Standards:
T 220 Physical testing of pulp handsheets
T 222 Acid insoluble lignin in wood and pulp
T 227 Freeness of pulp (Canadian standard method)
T 278 Pulp screening (Valley-type screening device)
T 425 Opacity of paper (15/d geometry, illuminant A/2 degrees, 89% reflectance backing and paper backing)
T 448 Water vapor transmission rate of paper and paperboard at 23ºC and 50% RH
T 460 Air resistance of paper (Gurley method)
T 465 Static creasing of paper for water vapor transmission tests
T 476 Abrasion loss of paper and paperboard (Taber-type method)
T 541 Internal bond strength of paperboard (z-direction tensile)
T 564 Transparent chart for the estimation of defect size
T 566 Bending resistance (stiffness) of paper (Taber-type tester in 0 to 10 Taber stiffness unit configuration)
T 577 Score bend test
T 844 Determining construction (nominal basis weight) of corrugated board

Approved reaffirmation of current American National Standards:
T 200 Laboratory beating of pulp (Valley beater method)
T 213 Dirt in pulp-chart method
T 248 Laboratory beating of pulp (PFI mill method)
T 277 Macro stickies content in pulp: the “pick-up” method
T 411 Thickness (caliper) of paper, paperboard, and combined board
T 650 Solids content of black liquor

Approved revision of current American National Standards:
T 259 Species identification of nonwood plant fibers
T 428 Hot water extractable acidity or alkalinity of paper
T 444 Silver tarnishing by paper and paperboard
T 459 Surface strength of paper (wax pick test)
T 572 Accelerated pollutant aging of printing and writing paper by pollution chamber exposure apparatus
T 573 Accelerated temperature aging of printing and writing paper by dry oven exposure apparatus
T 1212 Light sources for evaluating papers including those containing fluorescent whitening agents

Notices of the approvals of the TAPPI Standards as American National Standards were placed in the November, 5 2021 edition of ANSI Standards Action.

TAPPI Standards guidelines require that all TAPPI members receive notification of any proposed new Standard or TIPs. This message is being sent to you because you are a TAPPI member; have purchased TIPs or Standards products from TAPPI; or because you have previously expressed interest in this topic.

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