TAPPI T829

What is TAPPI T829? The Score Quality Testing Standard

TAPPI T829 is the TAPPI standard for measuring score quality of corrugated containers. The test determines the score break force for both scored and unscored sections of a corrugated sample. These values are used to calculate a score ratio, which indicates whether the scoring process has produced a score of acceptable quality. Results help corrugated producers and converters verify scoring consistency and identify problems before materials reach packaging lines.

Thwing-Albert’s TAPPI T829 Equipment

Score Quality Fixture

The Score Quality Fixture measures score quality of corrugated containers per TAPPI T829. The fixture consists of two parts: an upper grip adapter that functions as a pressure bar, and a lower grip adapter that functions as a u-channel wall. During testing, the sample is positioned centered under the pressure bar and over the u-channel opening. The test produces score break force values for both scored and unscored sections, which are used to calculate the score ratio and determine a pass or fail result.

The Score Quality Fixture is compatible with three Thwing-Albert instruments:

• 1270 PCA Score Bend Tester using the Score Bend Fixture for Score Quality (Part #202-3010)
• Vantage Series Universal Testing Machine using the Vantage Fixture for Score Quality (Part #1750-3105)
• QC-3A Universal Testing Machine

Related Test Properties and Standards

• Bending Resistance Testing Equipment for measuring the force required to bend paperboard and corrugated samples
• Stiffness Testing Equipment for evaluating the rigidity of paperboard and corrugated materials
• Folding Force Testing Equipment for measuring the force required to fold scored corrugated and paperboard materials
• TAPPI T577, Bending Properties of Folded Cartons and Scored Paperboard for measuring bending force and score ratio of folded cartons and paperboard
• TAPPI T576, Folding Endurance of Paperboard for evaluating the folding endurance of paperboard materials
• Corrugated Testing Equipment for testing corrugated board and container materials
• Paperboard Testing Equipment for testing paperboard materials used in folding carton and packaging applications
• Packaging Testing Equipment for quality control and runnability testing of packaging materials

Frequently Asked Questions

What does TAPPI T829 measure?

TAPPI T829 measures the score quality of corrugated containers by determining the score break force for scored and unscored sections of a sample. The results are used to calculate a score ratio and determine whether the material passes or fails the scoring quality threshold.

What instruments can perform TAPPI T829 testing?

The Thwing-Albert Score Quality Fixture is compatible with three instruments: the 1270 PCA Score Bend Tester, the Vantage Series Universal Testing Machine, and the QC-3A Universal Testing Machine.

What is a score ratio in TAPPI T829?

The score ratio is calculated from the score break force of the scored section compared to the unscored section of the same corrugated sample. This ratio indicates the relative quality of the score and is used to determine a pass or fail result for the material tested.

What materials does TAPPI T829 apply to?

TAPPI T829 applies to corrugated containers, paperboard, and plastics.

What is the difference between TAPPI T829 and TAPPI T577?

TAPPI T829 covers score quality testing of corrugated containers. TAPPI T577 covers the bending properties of folded cartons and scored paperboard, including bending force and score ratio. Both tests can be performed using the 1270 PCA Score Bend Tester with the appropriate fixture.

Have Questions About TAPPI T829 Testing?

Have questions about TAPPI T829 testing or the Score Quality Fixture? Contact us or request a quote and our team will help you find the right solution.

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