ISO 5267/2

Introducing ISO 5267/2 – Industrial Physics

ISO 5267/2 is a global ISO testing standard that follows the Canadian Standard freeness method to determine the drain ability of pulp suspensions in water.  

The whole of the ISO 5267 freeness of pulp testing standard is focused on determining the drain ability of pulps. It contains two separate parts: 

• ISO 5267/1: Schopper-Riegler method 
• ISO 5267/2: “Canadian Standard” freeness method. 

What is the Canadian Standard freeness test?

Part two of ISO 5267 deals with the Canadian standard freeness test which you can use for freeness testing of all kinds of pulp in aqueous suspension. 

The Canadian Standard freeness test was designed to provide a measure of the rate at which a dilute suspension of pulp is dewatered under specified conditions.  

It’s been shown that drainability is related to the surface conditions and swelling of the fibers. So, this freeness of pulp test offers a useful index of the amount of mechanical treatment to which the pulp has been subjected. 

The rate at which a suspension dewaters depends on the conditions of measurement, particularly the geometric characteristics of the instrument.  

ISO 5267/2 Canadian standard freeness test reporting

To prepare a successful ISO 5267/2 Canadian standard freeness test report you’ll need to include the following information as a minimum: 

• The date and place of your freeness of pulp testing 
• All information necessary for identification of the sample tested 
• The test temperature and concentration, if different from the standard 
• The mean result 
• The type of funnel used  
• Any unusual observations during the freeness of pulp test. 

ISO 5267/2 freeness of pulp testing apparatus

To carry out a successful ISO 5267/2 Canadian standard freeness test you’ll need the following kit: 

Canadian Standard freeness tester: with a drainage chamber and a rate-measuring funnel, mounted on a suitable support. These are described in some detail in the annexes of the ISO 5267/2 testing documents.  

Measuring cylinders: calibrated in milliliters, capable of measuring volume with an error less than 1,0 ml for volumes up to 100 ml; an error less than 2,0 ml for volumes between 100 ml and 250 ml; and an error less than 5,0 ml for volumes above 250 ml. 

Weighing balance: capable of reading accurately to 0,01 g. 

Standard water: for physical testing. 

ISO 5267/2 freeness tester equipment

So, how can Industrial Physics improve your ISO 5267/2 freeness of pulp testing?  

Messmer Büchel Schopper-Reigler Freeness Tester 33-29
The Schopper-Riegler Freeness Tester 33-29 will accurately determine how quickly any diluted pulp solutions will drain. 

Brought to you by Messmer Büchel, our paper inspection specialist brand, our Schopper Riegler freeness tester 33-29 reliably determines the rate of drainage and expresses it in a Schopper Riegler (SR) value.   

Are you involved in paper making? When you need to make consistently high-quality sheets, careful examination of the surface conditions and swelling of the fibers is important. The good news is, our Schopper Riegler freeness tester 33-29 helps you to achieve freeness of pulp testing perfection. 

Need ISO 5267/2 testing solutions? Get in touch

We’ve learnt a thing or two about freeness of pulp testing over the decades. Now Industrial Physics is recognized as a brand that likes to bring new, innovative freeness testers and freeness of pulp testing equipment to market.  

We like to share our knowledge and we’re here to help you to answer your questions about thickness testing. Across the knowledgebase section of our website we publish lots of blogs on related subjects.   

For example – this report provides an introduction to instruments which cover all aspects of pulp evaluation in terms of screening, beating and refining, freeness measurement, fiber classification and laboratory handsheet preparation 

If you have any questions about ISO 5267/2 and how we can help you with your freeness of pulp testing, then please just get in touch!

Your global test and measurement partner for ISO 5267/2