The objective of this Standard is to specify the product requirements for the types of wet process fibreboards—hardboard, medium board and softboards. The aim is to reflect current marketplace expectations for wet process fibreboard performance.

The objective of this revision is to update physical properties of product.

This Standard is Part 4 of the AS/NZS 1859 series, dealing with reconstituted wood-based panel products, as follows:

AS/NZS
1859 Reconstituted wood-based panels—Specifications
1859.1 Part 1: Particleboard
1859.2 Part 2: Dry process fibreboard
1859.3 Part 3: Decorative overlaid wood panels
1859.4 Part 4: Wet process fibreboard (this Standard)

Statements expressed in mandatory terms in footnotes to tables are deemed to be requirements of this Standard.

The term ‘informative’ has been used in this Standard to define the application of the appendix to which it applies. An ‘informative’ appendix is only for information and guidance.

First published as part of AS O114-1968 and AS O116-1968. AS O114-1968 revised and redesignated in part as AS2458-1982. AS O116-1968 revised and redesignated in part as AS 2459-1982. AS 2458-1982 jointly revised and redesignated as AS/NZS 1859.4:1997. AS 2459-1982 jointly revised and redesignated as AS/NZS 1859.5:1997. AS/NZS 1859.4:1997 and AS/NZS 1859.5:1997 jointly revised, amalgamated and redesignated as AS/NZS 1859.4(Int):2001. Jointly revised and designated as AS/NZS 1859.4:2004. Second edition 2018.