أخبار الشركة عن ISO 534: Paper Thickness Tester Paperboard Thickness Test Machine

ISO 534: Paper Thickness Tester

Preface

Paper and board are among the most widely used industrial and consumer materials worldwide. Thickness is a fundamental physical property that directly influences printability, stiffness, strength, packaging performance, and end-use quality. Uniform and traceable thickness measurement is critical for paper manufacturing, printing, packaging, research, and quality certification. ISO 534 establishes the globally accepted methodology for such measurement, and the Paper Thickness Tester is the precision instrument designed to perform these tests accurately and repeatedly.

Ⅰ. Introduction to ISO 534 Standard

ISO 534 (officially titled Paper and board — Determination of thickness, density and specific volume) is the international standard that defines the test procedures for measuring the thickness of paper and board. It specifies two core measurement methods:

Single-sheet thickness: Measurement on an individual sheet under standardized contact pressure and area.

Bulking thickness: Measurement on a stack of sheets to calculate average sheet thickness and bulk properties.

The standard also provides formulas to compute apparent density and specific volume from thickness data. It applies to most paper and paperboard grades but excludes corrugated fiberboard and tissue products. Compliance with ISO 534 ensures measurements are consistent, comparable, and recognized across laboratories, factories, and global supply chains.

Ⅱ. Paper Thickness Tester: Core Instrument for Paper and Board Testing

The ISO 534 Paper Thickness Tester is a precision mechanical measuring instrument purpose-built to satisfy all requirements of ISO 534. It integrates a high-precision displacement sensor, standardized presser foot and anvil, constant-pressure loading mechanism, digital control system, and touchscreen or digital display. The instrument ensures parallel measuring surfaces, stable contact pressure, precise positioning, and high-resolution readings to deliver reliable, repeatable results for laboratory quality control and production-line inspection.

Ⅲ. Working Principle

In full accordance with ISO 534, the tester operates as follows:

A conditioned paper or board sample is placed flat between the lower anvil and upper presser foot.

The presser foot applies a standardized contact pressure over a defined contact area to avoid sample compression bias.

The high-precision displacement sensor measures the exact distance between the two parallel surfaces.

The control system processes the reading and displays thickness; advanced models automatically compute density and specific volume.This method eliminates human error and ensures measurements conform to the single-sheet and bulking thickness requirements of ISO 534.

Ⅳ. Key Functions and Features

1. Fully complies with ISO 534 and supports corresponding national and industrial standards.

2. Measures single-sheet thickness and bulking thickness with one-key switching.

3. High resolution, typically 0.001 mm, with high linearity and stability.

4. Standardized contact pressure and anvil area to meet ISO 534 specifications.

5. Automatic calculation of density and specific volume based on measured thickness.

6. Digital/touchscreen display, data storage, statistics (average, max, min), and print/USB export.

7. Automatic or manual lifting of the measuring head for safe, convenient operation.

8. Compact, robust structure suitable for laboratory and workshop environments.

Ⅴ. Application Fields

1. Paper and board mills: Online and offline quality control of base paper, coated paper, cardboard, and specialty paper.

2. Printing and packaging industry: Thickness verification for printing paper, packaging board, carton stock, and label materials.

3. Testing and certification institutions: Third-party inspection, product certification, and compliance testing per ISO 534.

4. R&D institutions: R&D of new paper grades, functional coatings, laminated materials, and composite sheets.

5. Educational laboratories: Teaching and experimental analysis of paper physical properties.

Ⅵ. Value of Compliance with ISO 534

Adopting ISO 534-conforming paper thickness testers brings clear value:

Global consistency: Measurements are comparable across countries, factories, and laboratories.

Quality stability: Supports tight process control to reduce defects and improve product uniformity.

Market access: Test results are widely accepted for international trade, customer audits, and product certification.

Data credibility: Standardized methods enhance the reliability of R&D, quality reports, and technical documents.

As paper and board products continue to evolve toward higher performance and precision, ISO 534-compliant thickness testing will remain an indispensable quality pillar for the global paper industry.