ISO 3781 is the test method for the wet tensile strength of paper or board after immersion in water. To match this to your program, talk with our team.
What ISO 3781 Covers
It measures the tensile strength that remains after paper or board is soaked, characterizing wet-strength grades used in packaging and labels.
How the Test Is Run
A specimen is immersed for the specified time, then gripped and pulled at a controlled rate, and the wet tensile strength is recorded.
Why It Matters
Wet tensile strength defines performance of paper that gets wet; consistent immersion and gentle handling of the weakened specimen are essential.
Reading the Designation
Cited as ISO 3781 with its edition year. Confirm the edition and specimen or conditioning requirements before finalizing setup. To configure a paper testing setup, request a quote.
Related Standards
ISO 1924-2 covers dry tensile and ISO 12625-5 covers tissue wet tensile.
Request a Quote
Setting up wet tensile testing to ISO 3781? Request a quote and our team will help you build a system matched to your grammage and immersion time.
TensileMill CNC products for ISO 3781
Our specimen-preparation systems and testing equipment compatible with ISO 3781:
Electro Mechanical Universal Testing System 5 kN / 50 kN with Precision Load Cell
Electro-Mechanical UTM · 5 kN / 50 kN with Precision Load Cell
Build your ISO 3781 workflow with TensileMill CNC
TensileMill CNC designs and builds the systems labs use for standards-based mechanical testing. Depending on your specimens, that can include universal testing machines with paper and board grips and compression fixtures. Tell us your materials, specimen forms, and required test sections, and our team will match the right configuration.