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Technical Notes

Tear Strength Testing — Part 4

Test report contents: reference standard, sample description, specimen type and thickness, tear-strength values, conditioning environment and validation.

Published: 2022-12-19

Tear Strength Testing — Part 4

9. Test Report

9.1 Reference Standard

Record the reference standard followed for the test.

9.2 Sample Description

Describe the test sample in detail — composition, hardness, source, batch.

9.3 Specimen Type and Thickness

Report the specimen type (A / B / C / T / CP) and measured thickness in millimetres.

9.4 Tear Strength Value

Record the final tear-strength value of the test sample, rounded to 1 N/mm. For T-type and CP-type specimens, report the tear-strength value separately for each direction, rounded to 1 N/mm, and include the tensile-curve analysis and the value-selection method.

9.5 Conditioning Environment

Record the conditioning temperature, humidity, and time, plus the test laboratory ambient.

9.6 Equipment Identification

Record the tensile testing machine identifier (manufacturer, model, serial number, last calibration date) and the cutting/grinding equipment used in specimen preparation.

9.7 Test Date and Operator

Date and operator identifier.

9.8 Notes

Note any anomalies (specimen defects, atypical tear modes), the number of specimens discarded and the reason, and any deviation from the reference standard.

10. Validity

The test result is valid only if at least four of the five specimens deliver acceptable, recorded results; otherwise, retest with a new conditioning batch.