AS 1301.457:2020 Methods of test for pulp and paper Method 457: Determination of moisture content in paper, board and pulps.
This document specifies a test method for determining moisture content in paper, board and puips.
2 Normative references
There are no normative references in this document.
NOTE Documents referenced for informative purposes are listed in the Bibliography.
3 Terms and definitions
For the purpose of this Standard the following terms and definitions apply.
aggregate of paper or board or pulp of a single kind with specified characteristics produced under conditions that are presumed uniform, and available for sampling at one time
indicates the existence of an option
indicates that a statement is mandatory
indicates a recommendation
tare weight
indicates the weight of an empty container
test piece
piece or pieces of sampled material on which the moisture determination is to be carried out
4 Principle
A sample of paper, board or pulp from a lot is weighed before and after oven drying. The moisture content is calculated.
This oven-drying method applies to paper and board products and puips that do not contain any appreciable quantity of material other than water which will escape from the paper at the temperature specified for the test.
5 Apparatus
5.1 Balance
A balance having an accuracy of 0.05 % of the mass to be weighed, or better.
5.2 Containers
Containers for preventing changes in moisture content during the transporting and weighing of test pieces, having airtight lids or other equivalent means of sealing, and made from a lightweight material not subject to change under conditions of drying specified in this document. Where test pieces are taken according to AS/NZS 130 1.417s, the containers need to be large enough to contain sheets without cutting or tearing them. Before using a container, determine its tare weight.
5.3 Drying oven
A drying oven capable of being maintained at an air temperature of 105 ± 2 °C in the usable volume and having forced ventilation.AS 1301.457 pdf download.