TAPPI Standards published

Check below the list of TAPPI Standards recently published. All Standards are available on tappi.org. The information in parentheses indicates if the method was reaffirmed or revised:

Official Method

T 266 om-18 "Determination of sodium, calcium, copper, iron and manganese in pulp and paper by atomic absorption spectroscopy" (Revised)

T 271 om-18 "Fiber length of pulp and paper by automated optical analyzer using polarized light" (Reaffirmed)

T 491 om-18 "Water immersion number of paperboard" (Reaffirmed)

T 551 om-18 "Thickness of paper and paperboard (soft platen method)" (Reaffirmed)

T 568 om-18 "Physical area of sub-visible contraries in pulp, paper, and paperboard by image analysis" (Reaffirmed)

T 834 om-18 "Determination of containerboard roll hardness" (Reaffirmed)

Standard Practice
T 205 sp-18 "Forming handsheets for physical tests of pulp" (Reaffirmed)

T 218 sp-18 "Forming handsheets for reflectance testing of pulp (Büchner funnel procedure)" (Revised)

T 275 sp-18 "Screening of pulp (Somerville-type equipment)" (Reaffirmed)

T 1217 sp-18 "Photometric linearity of optical properties instruments" (Reaffirmed)

T 1218 sp-18 "Calibration of reflectance standards for hemispherical geometry" (Reaffirmed)

Classical Method
T 818 cm-18 "Ring crush of paperboard (flexible beam method)" (Reaffirmed)

Standard Glossary

T 1500 gl-18 "Optical measurements terminology (related to appearance evaluation of paper)" (Reaffirmed)

Standard Guideline

T 1501 sg-18 "Training standard for paper machine tender" (Revised)

These Standards replace the previous versions published.