AS/NZS 1605.2:2018 pdf free download.Methods for sampling and analysing timber preservatives and preservative-treated timber - Part 2: Determination of preservative penetration by spot test. AS/NZS 1605.2:2018 sets out the method for determining the penetration of preservative into preservative-treated wood products. It deals with the preparation of material for testing and the methods for determining the penetration of creosote, boron, copper...