Testing Standard:
TAPPI T844 Determining Construction (Nominal Basis Weight) of Corrugated Board
Standard Number
TAPPI T844
Standard Title
Determining Construction (Nominal Basis Weight) of Corrugated Board, Test Method
Overview:
TAPPI T844 Test Method is used to verify the grade of corrugated material. This method is ideal when comparing the corrugated material against the manufacturer’s specifications or verifying against previously tested materials. Purple Diamond Testing offers TAPPI T844 Determining Construction (Nominal Basis Weight) of Corrugated Board as part of our packaging compliance and validation services.
Rationale:
TAPPI T844 – Determining Construction (Nominal Basis Weight) of Corrugated Board. This test method is the first step in evaluating corrugated board when managing quality control, verification to specifications, and in predicting the expected strength performance of corrugated materials. The board is soaked in water and the adhesive is removed. The layers of paper are then oven dried and reacclimated to ambient lab conditions before being weighed. In most cases, the basis weight of combined board is specified in pounds per thousand square feet for each component (lbs/MSF). For example, a single wall board would be identified as “42 / 33 / 42” (outer liner, medium, and inner liner).
Key Points:
- Correlates to other paper characteristics such as TAPPI T403 for bursting strength
- Crucial when designing corrugated packaging
- Utilize this test method to ensure quality control
Related Standards:
- ISO 536 – Paper and Board – Determination of Grammage
- TAPPI T410 – Grammage of Paper and Paperboard (Weight Per Unit Area)
Related Testing Standards
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