Cookie settings

This website uses cookies to give you the best possible service. By using this website, you agree to the use of cookies. Detailed information can be found in our privacy policy.

Technically necessary

These cookies are necessary for the functionality of our website (e.g. security-related aspects)

Statistics

Cookies that are used to create anonymised statistics and analysis and thus improve the website.

Personalization

These cookies are used to show you personalized content that matches your interests.

back

Moisture Content (absolute)

31.10.2011 - Cartonboard Know-How

Absolute moisture describes the weight of the water content of cartonboard in relation to its dry weight.

Unit

%

Test Standard

DIN EN 20287

General information 

The moisture content is determined in accordance with DIN EN 20287. With the gravimetric method, the moisture amount that evaporates during the drying of the material is determined in % of the initial mass. Drying to constant weight takes place at 105 ° C +/- 2 ° C in an oven.

 

Additional details – practical relevance

Fibers which are used for cartonboard show a hygroscopic behaviour. They absorb or release moisture until they are in equilibrium with the ambient air. Therefore, substances whose material properties are affected by a change in the moisture content have to undergo a sufficient air conditioning before the actual examination can start. The humidity is dependent on the type of pulp (groundwood pulp, mechanical wood pulp, recycled fibers) and of the grammage. Virgin fiber grades are preferably produced with higher moisture content than recycled grades. Changes in dimensions and flatness, creasing, folding and gluing processes are influenced by the moisture content of the board.