Common Physical Tests for Paper and Board
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Paper Manufacturing TrainingCommon Physical Tests for Paper and Board

Common Physical Tests for Paper and Board

0.50 Hrs
SKU: RVCT-751

Depending on the grade and end use, different tests are performed to assess the quality of the paper or board being produced on a machine. Physical tests assess physical properties of the sheet, such as density, thickness, and different kinds of strength. Common physical tests include basis weight or grammage, moisture content, caliper, density, bulk, smoothness, porosity, stiffness, tensile strength, burst strength, tear strength, and folding endurance. This module will introduce some common physical tests, followed by a discussion on the importance of sample collection and conditioning, sheet formation, and moisture content.

Course Details | FAQ | Transcript
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Common Physical Tests for Paper and Board
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Course Details

Learning Objectives

• List common criteria used to differentiate between paper and board grades • List some common paper and board grades • Describe basis weight testing, including principles and units • Describe moisture testing, including principles and units • Describe caliper, density and bulk testing, including principles and units • Describe smoothness testing, including principles and units • Describe porosity testing, including principles and units • Identify the organizations which have established standard testing, sampling, and conditioning procedures • Explain how sheet formation and moisture content can affect test results • Describe the importance of standardized sampling techniques and sample conditioning

Specs

Course Level
Intermediate
Languages
English, Portuguese, Russian
Compatibility
Audio, Video
Based on:
Industry Standards and Best Practices

Author | Vector Solutions

With over two decades of experience designing advanced 3D animated courseware and developing our proprietary learning management software, we pride ourselves by having developed over 1,000 safety and operations training modules, which have helped train over 250,000 workers worldwide. Our highly experienced team provides the industry with a simple and high-quality means of training their workforce. Whether your team consists of 25 people or an enterprise with thousands, we’re here to help.

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Frequently Asked Questions

Which standardized test methods are most commonly used in the U.S.?

The standards managed by the Technical Association of the Pulp and Paper Industry (TAPPI) are most common.

What is basis weight?

Basis weight refers to the weight in pounds of a ream of paper, where a ream is defined as 500 base size sheets. Different grades have different base sizes so basis weight cannot be directly compared across grades. Grammage (grams per square meter) is another way to express the weight per area, and values can be directly compared.

What is caliper?

Caliper is the thickness measurement of paper or board.

How is smoothness measured?

There are many different ways to measure smoothness (optical, friction, profile measurements, ink contact area) but air flow measurements are must commonly used.

Why is porosity measured?

Porosity determines the ability of a sheet to absorb ink or water, protect certain products, or act as a filter.

Sample Video Transcript

Porosity is a measure of the air resistance or air permeability of a sheet. This property effects the ability of a sheet to package and protect certain products, to absorb liquids like water and ink, or to act as a filter. Various instruments have been developed and are used, and most of them work in one of two ways. They either measure the length of time it takes for a specific volume of air at a controlled pressure to pass through a defined area the sheet. Or they measure the air flow rate through an area of the sheet while maintaining a constant pressure difference.

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