Method for marking a tree trunk with a biodegradable aqueous solution of marking colour, and a biodegradable aqueous solution of marking colour

摘要

The invention concerns a method for marking wood ears with biodegradable water colouring containing an anti-rusting agent. The method injects the labelled water solution containing 35-55 p-%water and 40-60 p-%glycerol with a maximum of thirty days of biodegradability according to the OECD 301 test method over the tree body,0,05-1 p-%of the colouring agent 0,1-2 p-%of the anti-corrosive agent, where the sum of glycerol and water in the said aqueous solution is nevertheless more than 95%