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The Eleventh Report of the International Research Group on Wood Preservation 1980-82
1982 - IRG/WP 5154
IRG Secretariat


Hardwood field experiment: Progress report 1977-82
1982 - IRG/WP 3200
The international hardwood field experiment was planned in 1976 and set up in some 30 different sites around the world. The test stakes include 4 reference species common to each site and in most cases at least 2 species of local importance. It was hoped that a picture of performance of a range of economically important species would be built up and at the same time provide vital background information for people currently engaged in hardwood and soft-rot research. It is felt that these aspirations are more than being achieved and that as time proceeds this trial will prove invaluable in developing our knowledge of wood preservation on a world wide basis. Obviously it proved impossible to set up such a large trial simultaneously. Different sites also inspect their trials at different times and so the data presented is for different periods dependant on the site. For the reference species table 1 gives the latest data from each site and should be considered with report IRG/WP/3164 which gave information at earlier dates. Table 2 gives the performance of the other species for each site and, where stakes were available, for the master site (33) at Imperial college. No attempt has been made to analyse or comment on the results at this time. It is felt that this is a progress report for comment on by the sub-group. However, it is felt that together with the comments received these results should be duly considered for publication elsewhere.
D J Dickinson, J F Levy


Blue stain in timber in service. Progress review of Sub-group collaborative tests - 1981/82
1982 - IRG/WP 2178
Following from the discussions after reporting Document IRG/WP/2146 at the Meeting in Sarajevo, 1981, it was decided that 1.) more precise definition was needed of the artificial weathering schedules used in the work - participants to re-check Table 8 and send further details or amendments to Dr Bravery; 2.) a further test employing a wider range of chemicals was necessary using a smaller range of artificial weathering schedules; 3.) a new test should be conducted to the panels during the biological tests. The 1982 programme is based on co-operation offered in Sarajevo for two institutes each to use Atlas (Sadolin and TIC Copenhagen) and Xenotest (BAM and EMPA) equipments, and one institute (PRL) to use the Marr and natural weathering exposure. Imperial College offered to carry out treatments and application of coatings. The chemicals included at the suggestion of participants were: Preventol A4 (PA4 1.0%), Phenyl mercury succinate (PMS 1.0%), Nopcocide N96 (N96 1.5%), Pentachlorophenol (PCP 5.0%), Thiocyanomethyl Thiobenzothiazole (TCMTB 1.0%), and Troysan Polyphase (TRP 1.0%) all applied in 50:50 white spirit: linseed oil which served also as a control.
A F Bravery, D J Dickinson