Protocols for testing novel formulations prior to approval or registration as wood preservatives are being developed in a number of countries, e.g. Australia, New Zealand, USA. One aspect which must be addressed is the effectiveness in tests relative to that of currently approved formulations which would be acceptable to approving authorities. It is assumed that natural exposure testing is a prerequisite procedure before application for approval is sought and that a minimum exposure period of five years is required. Using CCA as a reference formulation and combined field test stake results from other copper-chrome-(non-arsenical component) formulations, performance criteria have been developed for novel formulations where approval for use in ground contact is sought.

Download document (340 kb)
free for the members of IRG. Available if purchased.

Purchase this document