Direct Answer: The DEK‑TRON Zero Strength Time Tester (ZST) determines the time required for a paper or board sample to lose its strength when exposed to elevated temperature, following the ASTM D1430 test method.

What is the Zero Strength Time Tester?

The DEK‑TRON Zero Strength Time Tester—also known as the Zero Strength Tester or ZST—is a precision instrument designed for industrial and research laboratories to measure the thermal stability and bonding integrity of paper and similar materials under controlled heat exposure.

How does it work?

The test specimen is placed under controlled temperature conditions. Using a temperature controller conveniently located on the front control panel, the desired test temperature can be set using the up and down arrow keys. The instrument measures the time it takes for the specimen to lose its tensile strength, providing a key indicator of material performance under heat.

Key features

• Complies with ASTM D1430 testing standards
• Modern, durable construction for industrial laboratory use
• Simple front‑panel temperature adjustment with digital precision
• Reliable measurement of zero‑strength time under thermal load
• Supported directly by DEK‑TRON with calibration, parts, and service

Applications

Used in paper, pulp, and materials testing laboratories to evaluate heat‑induced strength loss and thermal stability of paper, board, and fiber‑based materials.

FAQs

What standard does the ZST follow?
ASTM D1430 – Standard Test Method for Zero Strength Time of Paper.

What materials can be tested?
Paper, board, and similar fiber‑based materials.

Does DEK‑TRON provide technical support?
Yes—technical assistance, calibration, parts, and repairs are available directly from the factory.