Tissue Making Process Testing

SKU: C-873Duration: 18 Minutes

Pay-per-view (PPV) format perfect for individual users.

Get immediate access to this interactive eLearning course online. Must be used within 30 days, expires 48 hours after launch.

Language:  English

Great for trainers or groups who need unlimited online access to multiple courses. Available in two ways:

Tissue Properties and Testing Series (Details)
Includes 1 courses for $99/year.

Tissue Library (Details)
Includes 32 courses for $699/year.

Ideal for corporate licensing and high volume users.

Get Convergence courses into your current LMS to track and report employee training. Or contact us to learn more about the advantages of licensing our courses with the Convergence LMS.

Course Details


Training Time: 18 minutes

Compatibility: Desktop, Tablet, Phone

Based on: Industry Standards and Best Practices

Languages: English

Several characteristics of stock and water flows to and around a tissue machine are often monitored and/or controlled for multiple reasons. This module will cover pH, consistency, temperature, freeness, and charge demand.

Learning Objectives

  • Explain why stock and white water flows to and around tissue machines are often monitored for pH, consistency, temperature, fiber size distribution, freeness, and charge demand
  • Explain what these process tests measure
  • Define first pass retention and identify problems that can result from low retention values
  • Explain how the results of these tests can be used to optimize or ensure machine runnability or sheet quality
  • List safety hazards and safety guidelines associated with stock and white water systems

Key Questions

The following key questions are answered in this module:

What is consistency?
Consistency is the weight percentage of dry fiber in a mixture of fiber and water.

Why is temperature important?
Water viscosity decreases as temperature increases, which makes the water drain from the sheet more easily. Higher temperatures also improve refining results and can affect chemical additive efficiencies and biological growth.

What is freeness?
Freeness measures the drainage rate of water from a dilute pulp suspension. The faster the water drains, the higher the freeness.

Why is charge demand important?
Anionic trash or cationic demand is important to measure because undesirable dissolved materials in the white water reduce the effectiveness of additives and can cause runability problems.

Why is pH control important?
pH affects chemical additive efficiency and retention, refining, retention, drainage, and formation.

Sample Video Transcript

Below is a transcript of the video sample provided for this module:

Several characteristics of stock and water flows to and around a tissue machine are often monitored and are controlled for multiple reasons, including: to ensure a consistent flow of stock to the tissue machine, to optimize runability of the machine and prevent process upsets including sheet breaks, to optimize the efficiency of chemical additives and the results of various processes including refining, to produce a consistent high quality tissue sheet with the desired sheet characteristics. The following characteristics are often monitored: pH, consistency, temperature, fiber size distribution, freeness, and charge demand.
Added to Cart! Click here to view your cart.